UGC NET Paper 1: Held on 13th Dec 2023 Shift 2 (Previous Year Paper)

Calculation:

Let the time period be t,

Now, according to the question,

⇒ (E × 8 × 2t /100)  - (B × 6 × t / 100)  = 4200

⇒ t(16E - 6B) = 420000

⇒ t (16 × 20,000 - 6 × 30,000 ) = 420000

⇒ t (140000) =  420000

⇒ t = 3 years

Now,  then the amount received by E is,

⇒ Intereset + 20,000 = {20,000 × 8 × (3 × 2)} / 100

⇒ 29,600

∴ The correct answer is "29,600".

Formula Used:

Single equivalent percentage of two successive increase of x% and y% = x + y + xy/100

Calculation:

If the interest received by F is 20% of the sum invested by him for 2 years the interest for 1 year is 10%,

If we invest the money at compound interest, then the total interest will be,

⇒ 10 + 10 + {(10 × 10)/100}

⇒ 21%

Now, the increased interest earned by him is,

⇒ 21% - 20% 

⇒ 1%

So the increased amount earned by him is,

⇒ 1% of 60,000

⇒ 600

∴ The correct answer is "600".

Calculation:

If the amount received by C is twice the money invested by him that means the principal amount is P

So, interest earned =  2P -  P  = P

⇒ P = P × R × 5 / 100

⇒ R = 20%

Now, we need to calculate the principal amount of C,

⇒ 29000 = P + (P × 20 × 5 / 100)

⇒ 2P = 29000

⇒ P = 14500

Now we need to calculate the compound interest for 2 years compounded half-yearly,

⇒ C_compound = P × (1 + {rate /200})^{2 × year} 

⇒ 14500 (1+ {20/200})^{2 × 2}

⇒ 14500 (1.4,641)

⇒ 21,229.45

∴ The correct answer is " 21,229.45".

Formula Used:

Interest = PRT / 100

Calculation:

⇒ Interest rate of F = Interest rate of A + 2%

⇒ 6% + 2% 

⇒ 8%

Now, we have to calculate the interest value of F,

Interest = 60,000 × 2 × 8 / 100

⇒ 9600

Total interest received by D,

⇒ 9600 - 7575

⇒ 2025

Now, we can calculate the interest rate of D,

⇒ 2025 = 45,000 × R × 3 / 100

⇒ R = 2025 / 450 × 3

⇒ R = 1.5%

∴ The correct answer is "1.5%".

Formula Used:

Interest = PRT / 100

Calculation:

Let the interest rate of A and C be 2x and 3x respectively,

Now, according to the question,

⇒ 2x = 6

⇒ x = 3

So, the interest rate of C is 3x.

⇒ 3 × 3 = 9%

Interest I_c = 29000 -

Now, the principal amount of C (PC) is,

⇒ 29,000 - PC = P_C × 9 × 5 / 100

⇒ 29,000 - PC = PC × 0.45

⇒ PC = 20,000

As we know, the money invested by C will get doubled in T time when,

⇒ 20,000 = 20,000 × 9 × T / 100

⇒ T = 100/9

⇒ T = 11 (1/9)

∴ The correct answer is "11 (1/9)".

• Inquiry Learning:
  
• Inquiry learning is an educational approach where students learn by engaging in active exploration of real-world challenges and problems. It emphasizes asking questions, critical thinking, and problem-solving.
  
• In this method, teachers present a puzzling situation, and students solve the problem by gathering data, asking questions, and testing their conclusions. It's a student-centered approach that fosters curiosity and deeper understanding.
  
• This method is particularly effective in science and mathematics education, where hands-on experiments and investigations can significantly enhance learning.
  

<br>

• Discovery Learning:
  
• While discovery learning also involves exploration and problem-solving, it is more focused on students discovering facts and relationships on their own.
  
• The teacher's role is more of a facilitator, providing materials and a general direction. However, the specific situation of presenting a puzzling scenario and directly testing conclusions fits better with inquiry learning.
  

<br>

• Latent Learning:
  
• Latent learning refers to knowledge that is acquired without any immediate expression of that knowledge.
  
• It involves learning that occurs without any obvious reinforcement or visible behavior change at the time of learning, which is quite different from actively solving a problem through inquiry.
  

<br>

• Situated Learning:
  
• Situated learning theory posits that learning occurs through participation in a "community of practice."
  
• This approach emphasizes learning as a social process, where knowledge is co-constructed through interaction with others in specific contexts.
  
• While it involves engaging with real-life situations, it's more about immersion in environments and social interaction rather than solving a specific puzzling scenario presented by the teacher.
  

<br>

In summary, inquiry learning directly aligns with the described approach of presenting a puzzling situation for students to solve through data gathering and testing conclusions, making it the correct choice among the options provided. The other methods, while valuable and related to active learning, do not specifically focus on this problem-solving process in the same way.

Solution Explanation:

<br>

• Statement A: Conservation of natural resources.
  
• This statement is correct because one of the primary aims of environmental education is to teach individuals how to conserve natural resources. By understanding the importance of resources like water, air, and soil, and learning how their actions can impact these resources, people can make more informed decisions that lead to conservation.
  
• Hence, Statement A is correct.
  

<br>

• Statement B: Knowledge of causes of pollution.
  
• This statement is also correct. Environmental education seeks to inform people about the various causes of pollution, whether it's air pollution, water pollution, soil contamination, or any other form. By understanding the sources of pollution, individuals and communities can work towards reducing it.
  
• Hence, Statement B is correct.
  

<br>

• Statement C: Knowledge of measures to prevent pollution.
  
• This statement is correct as well. Alongside understanding the causes of pollution, environmental education also focuses on imparting knowledge regarding measures to prevent or minimize pollution. This includes practices like recycling, using less plastic, reducing emissions, and more.
  
• Hence, Statement C is correct.
  

<br>

• Statement D: Extensive extraction of natural resources.
  
• This statement is incorrect in the context of environmental education. Environmental education generally promotes sustainable use of natural resources rather than supporting their extensive extraction. The goal is to prevent overexploitation and ensure that natural resources are available for future generations.
  
• Hence, Statement D is incorrect.
  

<br>

• Statement E: Economising on scientific invention.
  
• This statement is somewhat vague but generally incorrect as a primary aim of environmental education. While innovation and scientific invention can play roles in solving environmental problems, economizing on scientific invention is not a direct aim of environmental education. The focus is more on sustainable practices and conservation.
  
• Hence, Statement E is incorrect.
  

<br>

Conclusion:

• The correct answer is option 1) (A), (B), and (C) only. These statements accurately reflect the goals of environmental education, which include conservation of natural resources, understanding and preventing pollution, and promoting sustainability. Statements D and E do not align with the primary objectives of environmental education.

• Understanding Statement (I): The statement defines the long-term memory tied to a particular time and place, especially memory of events in a person's life, as Implicit Memory. This is incorrect. The correct term for this type of memory is Episodic Memory. Episodic Memory is a part of the long-term memory responsible for storing information about events (episodes) that we have experienced in our personal past.
  

<br>

• Understanding Statement (II): This statement describes the knowledge that influences our behavior or thought without our awareness and states that this is called Episodic Memory. This is incorrect. The correct term for this type of memory is Implicit Memory. Implicit Memory is a type of long-term memory that doesn't require conscious thought. It allows you to do things by rote. It is not about the memory of specific events but about skills and procedures (e.g., riding a bike or playing a piano) and also influences feelings and perceptions.
  

<br>

• Conclusion:
  
• Statement (I) is incorrect because it mistakenly describes Episodic Memory as Implicit Memory.
  
• Statement (II) is incorrect because it mistakenly describes Implicit Memory as Episodic Memory.
  

<br>

• Hence, the correct option is 2: Both Statement (I) and Statement (II) are false.
  

<br>

• Solution Statement: Given the explanations above:
  
• Episodic Memory is correctly associated with memories of events tied to particular times and places in a person's life, making Statement (I) incorrect as it misidentifies this as Implicit Memory.
  
• Implicit Memory refers to the type of memory that affects our behaviors or thoughts without our conscious awareness, making Statement (II) incorrect as it misidentifies this as Episodic Memory.
  
• Therefore, both statements are false, making option 2 the correct answer.

• Correct Answer: Exclusive Premises
  
• Explanation: This fallacy occurs when two premises in a categorical syllogism are negative, leading to a conclusion that cannot logically be derived from them. In the given argument, both premises are negative ("No politicians are idiots" and "Some voters are not idiots"), but they attempt to draw a positive conclusion ("Therefore, some voters are not politicians"), which is logically incorrect because the premises do not sufficiently overlap to support the conclusion.
  

<br>

• Incorrect Options:
  
• Existential Fallacy: This fallacy happens when a conclusion asserts the existence of something, but the premises do not necessarily support that existence. This is not applicable here because the argument's error lies in the negative premises attempting to support a conclusion, not in the existence of entities within those premises.
  
• Affirming the Consequent: This logical fallacy occurs in a conditional (if-then) statement and involves mistakenly inferring the reverse of the original statement (if Q then P). The provided argument does not contain a conditional statement, making this choice irrelevant.
  
• Denying the Antecedent: Similar to affirming the consequent, this fallacy also occurs in a conditional statement but involves denying the antecedent (if not P, then not Q). Again, the argument does not use a conditional statement, so this option does not apply.

The correct answer is option 1: Both (A) and (R) are correct and (R) is the correct explanation of (A).

<br>

Key Points 

Assertion (A): Formaldehyde, widely used in plastics, wood products, insulating materials, glue, and fabrics, is a serious allergen.

• This statement asserts that formaldehyde is a significant allergen. Formaldehyde is indeed a widely used chemical in various products, including those listed in the assertion.
• It is known to cause allergic reactions in some individuals, particularly those who are sensitive or allergic to it. Allergic reactions to formaldehyde can manifest as skin irritation, respiratory issues, and other symptoms.

Reason (R): Allergens are substances that activate the immune system.

• This reason provides an explanation of why formaldehyde is considered a serious allergen. It states that allergens are substances that trigger the immune system.
• When the immune system recognizes an allergen, it mounts an immune response, which can lead to allergic reactions in susceptible individuals.
• This immune response is what causes the symptoms associated with allergies, such as inflammation, itching, and swelling.

 

Combining these statements, we can see that Reason (R) provides a valid explanation for Assertion (A). Formaldehyde's ability to activate the immune system and trigger allergic reactions aligns with the definition of allergens provided in Reason (R).

Therefore, both Assertion (A) and Reason (R) are correct, and Reason (R) appropriately explains why formaldehyde is considered a serious allergen.

• Ethical basis:
  
• Indian rhetoric, especially in its Hindu and Buddhist forms, is deeply rooted in ethical principles. These traditions emphasize moral values, right conduct, and the pursuit of dharma (duty, morality, virtue).
  
• Hinduism and Buddhism both advocate for a way of life that is in harmony with the natural world and the laws of karma, focusing on actions that promote spiritual growth and the welfare of all beings.
  
• This ethical foundation is evident in the teachings of the Bhagavad Gita, the Upanishads, and the Buddhist sutras, which all stress the importance of ethical behavior and moral decision-making.
  

<br>

• Materialist basis (Incorrect):
  
• While there are philosophical schools within Indian thought, such as the Charvaka school, that propose materialist and skeptical viewpoints, they do not represent the mainstream Hindu and Buddhist rhetoric focused on here.
  
• Hinduism and Buddhism, more broadly, prioritize spiritual and ethical development over materialistic pursuits.
  

<br>

• Euro-centric basis (Incorrect):
  
• Indian rhetoric, particularly in its religious and philosophical expressions, is distinctly non-Eurocentric. It has developed independently of European thought and offers a unique perspective that is rooted in the Indian subcontinent's cultural and historical context.
  
• The concepts and practices found in Hinduism and Buddhism are deeply intertwined with South Asian traditions, languages, and ways of life, making them distinct from European thought systems.
  

<br>

• Non-religious basis (Incorrect):
  
• While there are aspects of Indian culture and philosophy that are non-religious or secular, the specific reference to Hindu and Buddhist forms of rhetoric implies a connection to religious traditions.
  
• Both Hinduism and Buddhism are religions with rich theological foundations, and their rhetoric cannot be entirely separated from their religious contexts. These traditions offer spiritual insights and moral guidance that are inherently linked to their religious teachings.

The correct answer is - Presidency college

Key Points

• Presidency college
• The Hindu College of Calcutta was renamed as the Presidency College in 1855.
• Founded in 1817, it is one of the oldest institutions of higher education in India.
• The institution was originally set up to provide education in the liberal arts and sciences.
• It has played a significant role in the intellectual and cultural development of Bengal and India.

Additional Information

• Key Figures
• The college was founded by social reformers like Raja Ram Mohan Roy, David Hare, and Radhakanta Deb.
• It became a center for the Bengal Renaissance and produced many notable alumni, including Rabindranath Tagore and Subhas Chandra Bose.
• Academic Evolution
• Initially affiliated with the University of Calcutta, Presidency College became a university itself in 2010.
• It offers undergraduate and postgraduate courses in various disciplines including the sciences, humanities, and social sciences.
• Historical Significance
• Presidency College played a pivotal role in the spread of modern education in India.
• It has been a witness to and participant in significant historical events, including the Indian Independence Movement.

• Understanding p-value: The p-value in hypothesis testing is the probability of obtaining test results at least as extreme as the results actually observed, under the assumption that the null hypothesis is correct. A lower p-value indicates that the observed data are very unlikely under the null hypothesis.
  

<br>

• Interpretation of p-value: A common threshold for rejecting the null hypothesis is a p-value of 5% (0.05) or lower. This means that if the probability of observing the data is less than 5% assuming the null hypothesis is true, the null hypothesis is rejected in favor of the alternative hypothesis.
  

<br>

• Evaluating the options:
  

<br>

• (A) 0.38 of 2%: This is a bit unclear due to formatting, but it seems to suggest a p-value that is 0.38 times 2%, which equals 0.76%, or 0.0076. This is below the common threshold of 5%, suggesting that the null hypothesis is likely to be rejected. Hence, Statement A is correct.
  

<br>

• (B) 38%: This p-value is much higher than the 5% threshold. It suggests that there is a 38% chance of observing the data (or something more extreme) if the null hypothesis is true. This is not sufficiently unlikely, so the null hypothesis would not be rejected based on this p-value. Hence, Statement B is incorrect.
  

<br>

• (C) 2%: A p-value of 2% (or 0.02) is below the 5% threshold, indicating that the observed data are unlikely if the null hypothesis were true. Thus, the null hypothesis is likely to be rejected. Hence, Statement C is correct.
  

<br>

• (D) 0.46: This p-value of 46% is well above the 5% threshold, indicating that the observed data are quite likely under the null hypothesis. Therefore, the null hypothesis would not be rejected based on this p-value. Hence, Statement D is incorrect.
  

<br>

• Conclusion: Based on the above analysis:
  

<br>

• Option 1 (A) and (B) only: Incorrect because B is incorrect.
  
• Option 2 (A) and (C) only: Correct because both A and C suggest scenarios where the null hypothesis is likely to be rejected.
  
• Option 3 (B) and (C) only: Incorrect because B is incorrect.
  
• Option 4 (B) and (D) only: Incorrect because both B and D are incorrect.
  

<br>

• Solution Statement: The correct answer is option 2, (A) and (C) only, as both scenarios suggest p-values below the common threshold for rejecting the null hypothesis, indicating that the null hypothesis is likely to be rejected. Hence, Statements A and C are correct.

• Statement (I) Analysis:
  
• Dynamic RAM (DRAM) is indeed the most common type of RAM found in personal computers. It is less expensive and has a higher density compared to SRAM, which means it can store more data in the same amount of space. This makes DRAM an ideal choice for the main memory in computers where large amounts of storage are needed.
  
• Static RAM (SRAM), on the other hand, is much faster than DRAM because it does not need to be refreshed as DRAM does. However, SRAM is more expensive and has a lower density. This makes it less suitable for use as the main memory in computers but ideal where speed is critical, such as in the cache memory.
  
• Conclusion: Statement (I) is correct.
  

<br>

• Statement (II) Analysis:
  
• The processor's memory cache is indeed a high-speed portion of the computer's memory system. It is designed to speed up the access to data and instructions that the processor is likely to need next.
  
• SRAM is used for the processor's memory cache because it is faster than DRAM. The speed of SRAM allows the processor to access data and instructions with minimal delay, which is crucial for maintaining high performance. Despite its higher cost and lower density, the speed benefits of SRAM make it the preferred technology for cache memory.
  
• Conclusion: Statement (II) is correct.
  

<br>

• Overall Conclusion:
  
• Both Statement (I) and Statement (II) accurately describe the roles and characteristics of DRAM and SRAM in computer systems. DRAM's role as the main form of memory due to its cost-effectiveness and density, and SRAM's role in cache memory due to its speed, are both correctly identified.
  
• Hence, the correct answer is option 1: Both Statement (I) and Statement (II) are true.

The logic follows here is:

The number is obtained by adding the positional values of opposite letters of given words.

• 'FATHER' is coded as '104'

<br>

similarly,

• 'MOTHER' will be coded as :

Hence, the correct answer is "83".

• Statement A: All things are non-eternal, because they are knowable.
  
• This statement is based on the principle that anything that can be perceived or known is subject to change, and hence, cannot be eternal. This is a straightforward application of the Nyaya school's logic, without a direct counterbalance within the statement itself.
  
• Hence, Statement A is incorrect for the context of the question as it doesn't involve a counterbalancing reason.
  

<br>

• Statement B: Fire is cold because it is a substance.
  
• This statement presents a reason that is directly counterbalanced by common knowledge or empirical evidence. According to the Nyaya school, a substance can have various qualities, and being a substance does not necessarily make fire cold, as fire is empirically known to be hot.
  
• Hence, Statement B is correct because the reason provided is directly counterbalanced by the known quality of fire.
  

<br>

• Statement C: Sound is eternal because it is produced.
  
• This presents a reason that is counterintuitive or counterbalanced by the Nyaya school's understanding that anything produced is non-eternal. The Nyaya philosophy posits that anything that has a beginning (i.e., is produced) must also have an end, and thus cannot be eternal.
  
• Hence, Statement C is correct as the reason given is counterbalanced by the philosophical understanding of production and eternity.
  

<br>

• Statement D: Sound is a quality, because it is visible.
  
• This statement's reason is flawed or counterbalanced by the basic understanding that sound is not a visible phenomenon but an auditory one. The visibility of an object is not a quality that can be attributed to sound, making the reason provided inherently counterbalanced by the nature of sound itself.
  
• Hence, Statement D is incorrect for the context of the question since it doesn't involve a counterbalancing reason based on Nyaya logic but rather presents a fundamentally flawed reason.
  

<br>

• Conclusion:
  
• The correct answer is option 1, which includes Statements B and C. Both of these statements present reasons that are directly counterbalanced by another reason or understanding, fitting the criteria set by the question based on classical Indian school of logic (Nyay).

• Statement A (Physics): Incorrect
  
• Physics is the natural science that studies matter, its motion and behavior through space and time, and the related entities of energy and force. It does not directly study non-verbal communication, which involves the transmission of messages without the use of words.
  

<br>

• Statement B (Chemistry): Incorrect
  
• Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules, and ions. It focuses on the composition, structure, properties, and change of matter, not on non-verbal communication.
  

<br>

• Statement C (Linguistics): Correct
  
• Although linguistics primarily studies language and its structure, it also encompasses the study of non-verbal communication. This includes aspects like gestures, facial expressions, and body language, which are crucial for understanding human communication as a whole.
  

<br>

• Statement D (Social Psychology): Correct
  
• Social psychology examines how individual behavior and thought are influenced by social interactions and society. Non-verbal communication is a key area of study within this discipline, as it plays a significant role in how humans understand each other and form social connections.
  

<br>

• Statement E (Anthropology): Correct
  
• Anthropology is the study of humans, human behavior, and societies in the past and present. It includes the study of non-verbal communication as it explores how different cultures express themselves and communicate without words, through customs, rituals, and everyday behaviors.
  

<br>

Solution Statement:

• Hence, the correct answer is option 3: (C) Linguistics, (D) Social Psychology, and (E) Anthropology are the disciplines across which the non-verbal communication is studied. This is because these fields directly deal with aspects of human behavior, culture, and communication beyond the spoken or written word.

• Statement (I) Analysis:
  
• Dropbox is not an e-mail service. It is a cloud storage service that allows users to store files online and access them from any computer or mobile device with an Internet connection.
  
• This statement is incorrect.
  

<br>

• Statement (II) Analysis:
  
• Google Docs is indeed an online word processor that is part of Google's suite of office tools. It allows users to create, edit, and share documents online in real-time.
  
• This statement is correct.
  

<br>

• Conclusion:
  
• Since Statement (I) is incorrect because Dropbox is a cloud storage service, not an e-mail service, and Statement (II) is correct as Google Docs is an online word processor, the correct option is:
  
• Option 4: Statement (I) is false but Statement (II) is true.
  

<br>

• Solution Statement:
  
• Hence, the correct answer is option 4, where Statement (I) regarding Dropbox being an e-mail service is incorrect, and Statement (II) regarding Google Docs being an online word processor is correct.

• Correct Answer: Rio Summit
  
• The Convention on Biological Diversity (CBD) was opened for signature during the Earth Summit held in Rio de Janeiro, Brazil, in 1992. This international legal instrument is dedicated to promoting sustainable development and addresses all aspects of biological diversity: conservation, sustainable use, and the equitable sharing of the benefits arising from the utilization of genetic resources. The Rio Summit, officially known as the United Nations Conference on Environment and Development (UNCED), played a pivotal role in global environmental diplomacy by laying the groundwork for the CBD.
  

<br>

• Incorrect Options:
  
• Stockholm Conference
  
• Officially known as the United Nations Conference on the Human Environment, held in 1972, it was the first major international conference on environmental issues. While pioneering in raising global awareness and setting a basic framework for environmental governance, the Stockholm Conference did not involve the signing of the Convention on Biological Diversity.
  
• Ramsar Convention
  
• Formally named the Convention on Wetlands of International Importance, especially as Waterfowl Habitat, this agreement was signed in Ramsar, Iran, in 1971. It focuses on the conservation and sustainable use of wetlands. It is unrelated to the broader scope of the Convention on Biological Diversity.
  
• Montreal Protocol
  
• This is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances responsible for ozone depletion. Signed in 1987, the Montreal Protocol targets chemicals different from those covered under the Convention on Biological Diversity and serves a more specific environmental goal.

• Statement (I) Analysis:
  
• Canva is indeed an online tool that allows users to create various forms of creative content. This includes posters, infographics, presentations, and more. It provides a wide array of templates and design elements that users can utilize to create professional-looking designs even without extensive graphic design skills.
  
• Hence, Statement (I) is correct.
  

<br>

• Statement (II) Analysis:
  
• Edpuzzle is a platform designed to make educational videos more interactive. It allows educators to take existing videos from the web (for example, from YouTube) or upload their own videos, and then add questions, voiceovers, and notes. Students can then interact with the video by answering questions, which makes it a powerful tool for engagement and assessment in an educational setting.
  
• Hence, Statement (II) is correct.
  

<br>

• Conclusion:
  
• Since both statements accurately describe the functionality and purpose of Canva and Edpuzzle, respectively, the correct answer to the question is:
  
• 1) Both Statement (I) and Statement (II) are correct.
  
• Therefore, the correct option is option 1.

The correct answer is - Statement (I) is incorrect but Statement (II) is correct.

Key Points

• Statement (I) is incorrect
• According to the UGC Regulations 2018 on plagiarism, authorities in higher education institutes can indeed take suo moto notice of an act of plagiarism.
• This means that even without a formal complaint, authorities can act upon plagiarism cases if they become aware of them.
• Statement (II) is correct
• Plagiarism is defined as the practice of taking someone else's work or ideas and passing them off as one's own.
• This definition is widely accepted in academic and professional contexts.

Additional Information

• UGC Regulations 2018 on Plagiarism
• The University Grants Commission (UGC) has set strict guidelines to curb plagiarism in academic institutions.
• These regulations include mechanisms for detecting plagiarism and prescribe punishments based on the severity of the offense.
• Institutes are required to have a plagiarism detection software and a panel to investigate such cases.
• Consequences of Plagiarism
• Penalties for plagiarism can range from a warning to expulsion, depending on the extent of the plagiarism.
• Repeated offenses may lead to more severe punishments, including revocation of degrees.
• Academic integrity is crucial for maintaining the credibility and quality of educational institutions.
• Preventing Plagiarism
• Students and researchers are encouraged to cite sources properly to avoid plagiarism.
• Institutions often provide training and resources on how to properly attribute sources and use plagiarism detection tools.

The logic follows here is:

Given: daa_bc_cda_a_c_c

Let us divide the above pattern into groups consisting of 4 alphabets each then we have:

daa_/bc_c / da_a/_c_c

On checking each option:

1) a, b, a, c, b

→ d a a a / b c b c / d a a a / c c b c

2) a, c, b, a, c

→ d a a a / b c c c / d a b a / a c c c

3) a, c, a, b, c

→ d a a a / b c c c / d a a a / b c c c

It follows the pattern.

4) a, c, a, c, b

→ d a a a / b c c c / d a a a / c c b c

Hence, the correct answer is "a, c, a, b, c".

The correct answer is - Statement (I) is true but Statement (II) is false.

Key Points

• Statement (I) is true
• MyGov is indeed a platform developed by the Government of India.
• It aims to encourage citizen participation towards good governance by seeking their ideas and suggestions.
• This platform promotes engagement and transparency in governance.
• Statement (II) is false
• The MyGov platform is not developed by former Flipkart executives.
• It is not related to providing a cashless and seamless payment experience.
• This statement seems to confuse MyGov with another application or service.

Additional Information

• MyGov Platform
• Launched by the Government of India to facilitate participatory governance.
• Citizens can participate in policy formulation and program implementation.
• Includes various activities like discussions, tasks, and polls.
• Related Government Initiatives
• Digital India: A program to transform India into a digitally empowered society and knowledge economy.
• Startup India: An initiative to foster innovation and encourage startups.

Given:

Principal (P) = Rs. 10000

Time (t) = 3 years

Rate of interest (r) = 10%

Formula used:

S.I. = P × t × ${r \over 100}$

C.I. =  P(1 + ${r \over 100}$)^t - P

Calculation:

S.I. = 10000 × 3 × 10/100

⇒Rs. 3000

C.I. ⇒  A = 10000(1 + 10/100)³

⇒ A = 13310

C.I. = 13310 - 10000

⇒ Rs. 3310

Required difference = 3310 - 3000 = 310

∴ The correct answer is 310.

The correct answer is - Option 2: (B), (C) and (D) only.

Key Points

• Multi - disciplinarity and holistic education
• The New National Education Policy (2020) emphasizes the need for a broad-based, multidisciplinary, and holistic education at all levels of learning.
• This approach aims to develop well-rounded individuals with critical thinking and analytical abilities.
• Outstanding research as part of higher education
• The policy focuses on promoting high-quality research in higher education institutions.
• It aims to create a vibrant research culture that can contribute to the nation's development.
• Promotion of multilingualism in teaching and learning
• Multilingualism is encouraged to preserve cultural heritage and improve learning outcomes.
• Students are to be taught in their home languages/mother tongue, especially in the foundational years.

Additional Information

• Higher Education as a Fundamental Right
• The New National Education Policy (2020) does not specifically recognize higher education as a fundamental right.
• Instead, it focuses on making higher education more accessible and inclusive.
• Setting up of another Knowledge Commission
• The policy does not propose setting up another Knowledge Commission.
• It builds on the recommendations of previous commissions and committees to reform the education sector.

• The task is to arrange the given group of terms in order of increasing extension, which means we start from the most specific and move towards the most general.
  

<br>

• The terms given are:
  
• (A) Mammal
  
• (B) Wildcat
  
• (C) Feline
  
• (D) Animal
  
• (E) Vertebrate
  

<br>

• Let's analyze each term:
  
• Wildcat (B) is a specific type of animal, more specifically, it's a type of feline. This makes it the most specific term on the list.
  
• Feline (C) refers to the family of cats, which includes wildcats among other cat species. It is more general than Wildcat but more specific than Mammal.
  
• Mammal (A) is a class of animals that includes all felines among other mammals like canines, primates, etc. It's more general than Feline.
  
• Vertebrate (E) is a category that includes all animals with a backbone, which encompasses all mammals and therefore is more general than Mammal.
  
• Animal (D) is the most general term here, encompassing all vertebrates and more, including various phyla beyond just vertebrates.
  

<br>

• Given this analysis, the correct order from most specific to most general is:
  

1. Wildcat (B)
   
2. Feline (C)
   
3. Mammal (A)
   
4. Vertebrate (E)
   
5. Animal (D)
   

<br>

• Looking at the options provided:
  
• Option 1: (B), (C), (A), (E), (D) is the correct sequence as per our analysis.
  

<br>

• Conclusion: Hence, the correct answer is Option 1.

• Understanding Inductive Arguments:
  
• Inductive arguments are arguments where the premises seek to supply strong evidence for the truth of the conclusion. They are not designed to guarantee the truth of the conclusion as deductive arguments attempt to do, but rather to make the conclusion more likely.
  
• The strength of an inductive argument can vary. It can be stronger or weaker depending on the evidence provided and the methodology of reasoning. Therefore, inductive arguments are evaluated based on how strong or weak they are in supporting their conclusions.
  
• Hence, Statement (I) is correct.
  

<br>

• Understanding Deductive Arguments:
  
• Deductive arguments are arguments that aim at being valid. A deductive argument is valid if the truth of its premises guarantees the truth of its conclusion. In other words, it is impossible for the premises to be true and the conclusion false.
  
• A deductive argument can only be one of two things: valid or invalid. It is valid if the form of the argument ensures that the conclusion must be true if the premises are true. It is invalid if it is possible for the premises to be true and the conclusion false.
  
• Hence, Statement (II) is correct.
  

<br>

• Conclusion:
  
• After examining both statements, it is clear that Statement (I) accurately describes the nature of inductive arguments as being capable of varying in strength (stronger or weaker) based on the evidence provided and the reasoning used.
  
• Statement (II) correctly identifies deductive arguments as being either valid or invalid, with no middle ground, based on the logical structure and the relationship between the premises and the conclusion.
  
• Therefore, the correct answer is option 1: Both Statement (I) and Statement (II) are correct.

• Correct Answer: One/zero sampling
  
• Explanation: In one/zero sampling, an observer records whether a specific behavior occurs during a predetermined observation period. This method simplifies data collection by reducing it to a binary outcome: the behavior either happens (1) or it doesn't (0). It's particularly useful in studies where the frequency or presence of a behavior is of interest, rather than its duration or intensity.
  

<br>

• Incorrect Options:
  
• Cluster Sampling:
  
• This is a method used in statistics for survey sampling. It involves dividing the population into clusters, usually based on geographical areas or other logical divisions, and then randomly selecting clusters to be included in the sample. It's unrelated to behavior recording in naturalistic observations.
  

<br>

• Time-Interval Sampling:
  
• In time-interval sampling, the observer records whether a specific behavior occurs within predetermined intervals of time. While it shares similarities with one/zero sampling in that it involves discrete observation periods, the focus here is on capturing the occurrence of behavior within each interval, allowing for the measurement of both frequency and patterns over time.
  

<br>

• Continuous Real-Time Sampling:
  
• This method involves the continuous, real-time recording of behaviors as they occur. It captures a detailed account of all behaviors, their duration, and sometimes the intensity within the observation period. This approach is more comprehensive but also more resource-intensive compared to one/zero sampling.
  

<br>

• In summary, one/zero sampling is distinguished by its binary approach to data collection, making it a straightforward and efficient method for documenting the presence or absence of behaviors in naturalistic observation studies. The other options, while valuable in specific research contexts, do not accurately describe this binary recording technique.

The correct answer is - Statement (I) is true but Statement (II) is false.

Key Points

• Statement (I): True
• The National Policy on Education (1986) aimed to promote inter-disciplinary research in various fields including social sciences.
• This was part of a broader initiative to enhance the quality and relevance of higher education in India.
• Statement (II): False
• The National Policy on Education (1986) did not declare the idea of rural universities as untenable.
• In fact, the policy encouraged the development of rural universities to cater to the educational needs of rural areas and to promote rural development.

Additional Information

• National Policy on Education (1986)
• Focused on the improvement of educational standards across all levels in India.
• Highlighted the need for vocational and technical education to meet the demands of the economy.
• Emphasized on the need for the modernization of teaching methods and the incorporation of technology in education.
• Inter-disciplinary Research
• Encourages the integration of knowledge and methodologies from different disciplines to address complex issues.
• Promotes innovation and comprehensive understanding of social phenomena.
• Rural Universities
• Play a critical role in the development and education of rural populations.
• Provide access to higher education for students in rural areas, thereby aiding in rural development and empowerment.

The correct answer is - (A), (B), (C), and (D) only

Key Points

• Dr. B. R. Ambedkar's association with educational institutions:
• Elphinstone College, Mumbai (A): Dr. Ambedkar was a student here and graduated with a degree in Economics and Political Science in 1912.
• Khalsa College, Mumbai (B): He was briefly associated with this institution during his early educational journey.
• Milind College, Aurangabad (C): Dr. Ambedkar established this college to promote education among underprivileged communities.
• Siddharth College, Mumbai (D): This institution was also founded by Dr. Ambedkar to provide quality education to marginalized groups.
• Fergusson College, Pune (E): While a renowned institution, there is no historical evidence connecting Dr. Ambedkar directly to this college.

Additional Information

• Dr. Ambedkar's contributions to education:
• Dr. Ambedkar believed education was a key tool for social empowerment and aimed to make it accessible to all, especially the oppressed sections of society.
• He founded several institutions, including Siddharth College and Milind College, to promote higher education among Dalits.
• Dr. Ambedkar's legacy:
• In addition to his role in education, Dr. Ambedkar was the chief architect of the Indian Constitution and a pioneer of the Dalit rights movement.
• He emphasized the importance of education, social reform, and economic development for the upliftment of marginalized communities.

• Statement A: Second quartile - In a normal distribution, the median divides the data into two equal parts. The second quartile (Q2) is the median of a dataset, therefore, this statement is correct.
  

<br>

• Statement B: Mean - For a perfectly normal distribution, the mean, median, and mode are all equal. This is because the distribution is symmetric around the mean. Hence, the median is equal to the mean in a perfect normal distribution, making this statement correct.
  

<br>

• Statement C: 50th percentile - Percentiles are measurements that divide a dataset into 100 equal parts. The 50th percentile is the value below which 50% of the data lies, which is the definition of a median. Therefore, this statement is correct.
  

<br>

• Statement D: Mode - In a perfect normal distribution, the mode (the value that appears most frequently) is also equal to the mean and median. This is because the highest peak of the distribution curve occurs at the mean, which is also the median and mode in a perfectly normal distribution. Thus, this statement is correct.
  

<br>

• Statement E: 5th decile - Deciles divide the dataset into 10 equal parts. The 5th decile is equivalent to the 50th percentile, which is another way of expressing the median. Therefore, this statement is also correct.
  

<br>

Conclusion:

<br>

• Hence, Statement A (Second quartile) is correct because it's another term for the median.
  
• Statement B (Mean) is correct due to the properties of a perfect normal distribution.
  
• Statement C (50th percentile) is correct as it's a statistical measure that directly corresponds to the median.
  
• Statement D (Mode) is correct because, in a perfect normal distribution, the mode equals the median and the mean.
  
• Statement E (5th decile) is correct as it's essentially another expression for the median.
  

<br>

Therefore, the correct answer is option 4: (A), (B), (C), (D), and (E).

• Correct Answer Explanation:
  
• Peroxy Acetyl Nitrate (PAN) is the full form of the air pollutant in question. PAN is a secondary pollutant formed by the reaction of VOCs (Volatile Organic Compounds) and nitrogen oxides in the presence of sunlight. It is a significant component of photochemical smog, known for its role in harming vegetation, irritating eyes, and causing respiratory issues in humans.
  

<br>

• Overview of Incorrect Options:
  
• Polycyclic Aromatic Nitrate:
  
• This is a fabricated term and doesn't describe a known air pollutant. Polycyclic aromatic hydrocarbons (PAHs) are a different class of pollutants, but they do not form nitrates in the manner suggested by this option.
  
• Polycyclic Acetyl Nitrate:
  
• This option incorrectly combines "Polycyclic," which usually refers to compounds with multiple aromatic rings, with "Acetyl Nitrate," which does not correspond to a recognized pollutant. It seems to be a mix-up of terms without basis in air pollution chemistry.
  
• Peroxy Aromatic Nitrate:
  
• This term misleads by suggesting a direct connection between aromatic compounds and peroxy nitrates. While aromatic compounds can be involved in the formation of various air pollutants, "Peroxy Aromatic Nitrate" does not correspond to a specific known pollutant like PAN.

• Correct Answer: Humour
  
• In a communication environment, the paradoxical relationship between body and mind often results in humour. This is because humour frequently arises from unexpected juxtapositions or contradictions, which can include the disconnect or surprising connections between our physical reactions and our mental processes. For instance, laughing at oneself in awkward situations or finding humor in the incongruity between what we think and how we act.
  

<br>

• Incorrect Options:
  
• Mindfulness: While mindfulness involves a heightened awareness of the present moment, including thoughts, feelings, and bodily sensations, it is not directly related to the paradoxical relationship between body and mind in generating humour. Mindfulness is more about observing and accepting these aspects without judgment rather than finding humour in their contradictions.
  

<br>

• Self-importance: This refers to an exaggerated estimation of one's own importance or significance. It doesn't directly stem from the paradoxical relationship between the body and mind in communication contexts. Self-importance is more related to one's perception of self in relation to others, rather than the interplay between physical expressions and mental states that can lead to humour.
  

<br>

• Obedience: Obedience involves following orders or instructions from someone in authority. This concept is unrelated to the paradoxical relationship between body and mind in a communication environment that leads to humour. Obedience focuses on compliance and authority dynamics, not the humorous or unexpected outcomes of mind-body interactions.
  

<br>

In summary, humour emerges as the correct answer because it uniquely captures the essence of the unexpected and often contradictory relationship between our physical responses and mental perceptions in communicative contexts. The other options, while relevant to discussions of human behavior and psychology, do not directly address the creation of humour through this paradoxical interplay.

Solution:

<br>

To understand the essential components of dialogic communication according to Richard Johannesen, we analyze each statement provided:

<br>

• (A) A facade of pleasant greeting: This statement suggests a superficial or insincere approach to communication, which is not aligned with the principles of dialogic communication. Dialogic communication emphasizes authenticity and genuine interaction rather than just a facade.
  
• Hence, Statement A is incorrect.
  

<br>

• (B) Possessive warmth for others: While warmth for others is important in communication, the term "possessive" might imply a controlling or self-centered attitude, which contradicts the principles of dialogic communication that emphasize mutual respect and equality.
  
• Hence, Statement B is incorrect.
  

<br>

• (C) Empathic understanding: This is a key component of dialogic communication. Empathic understanding involves genuinely trying to understand the perspectives, feelings, and thoughts of others without judgment. This fosters a deeper and more meaningful connection.
  
• Hence, Statement C is correct.
  

<br>

• (D) Spirit of mutual equality: Dialogic communication is fundamentally based on the principle that all participants are of equal worth and dignity. The spirit of mutual equality ensures that the communication is respectful and considers all viewpoints equally.
  
• Hence, Statement D is correct.
  

<br>

• (E) Positive regard for others: Having a positive regard for others means approaching interactions with respect, kindness, and a positive attitude towards the inherent value of others. This is crucial for dialogic communication, as it sets the foundation for a constructive and respectful exchange.
  
• Hence, Statement E is correct.
  

<br>

Given the analysis above, the essential components of dialogic communication according to Richard Johannesen are:

<br>

• Empathic understanding (C)
  
• Spirit of mutual equality (D)
  
• Positive regard for others (E)
  

<br>

Therefore, the correct answer is option 3: (C) (D) and (E).

<br>

• Conclusion: The essential components of dialogic communication, as outlined by Richard Johannesen, emphasize the importance of genuine, respectful, and equal interaction among participants. These components are critical for fostering meaningful and authentic communication.

Solution Explained:

<br>

• Statement A: Incorrect. OLEDs, due to their plastic organic layers, are actually thinner and lighter compared to conventional LCD/LED screens. The organic layers of an OLED are applied to a plastic substrate, which allows for flexible, thinner, and lighter displays.
  

<br>

• Statement B: Correct. OLEDs do indeed provide brighter light and more vivid colors compared to LEDs. This is because OLED pixels emit their own light, allowing for true black levels and a high contrast ratio, which contributes to the vividness of the colors.
  

<br>

• Statement C: Correct. OLEDs produce a much larger field of view than LCD/LED formats. Since OLED displays can be viewed with no loss in quality from almost any angle, they do indeed offer a superior field of view.
  

<br>

• Statement D: Incorrect. One of the key advantages of OLED technology is that it does not require back-lighting. Each pixel in an OLED display is made of organic materials that emit light when electricity is applied. This is in contrast to LCDs, which do require a backlight to illuminate the pixels.
  

<br>

• Statement E: Incorrect. Generally, OLEDs consume less power than LCD/LED formats, especially when displaying dark scenes, because only the pixels that are lit consume power. However, in very bright scenes with a lot of white, OLEDs can consume more power than some LCDs. Nonetheless, the statement that OLEDs "consume more power than LCD / LED formats and thus produce more heat" is too broad and does not hold true across all scenarios.
  

<br>

Conclusion:

<br>

• Hence, Statement B (OLEDs give a brighter light than LEDs leading to more vivid colours) is correct.
  
• Statement C (OLEDs produce a much larger field of view than LCD / LED formats) is also correct.
  

<br>

Therefore, the correct answer is option 4: (B) and (C) only.

The correct answer is- C only

Solution Explanation:

<br>

• Statement A: They are a form of spyware.
  
• Incorrect: Internet cookies are not inherently spyware. Cookies are small pieces of data sent from a website and stored on a user's computer by the user's web browser while the user is browsing. They are designed to be a reliable mechanism for websites to remember stateful information or to record the user's browsing activity. While they can potentially be misused (e.g., by third parties to track browsing history), calling them spyware oversimplifies their purpose and functionality.
  

<br>

• Statement B: They are used only in advertising.
  
• Incorrect: While cookies are widely used in advertising to track users' browsing habits and to serve targeted ads, their use is not limited to advertising. They also play a crucial role in enhancing user experience on websites by remembering login details, preferences, and other personalized settings.
  

<br>

• Statement C: They are used to track browser use.
  
• Correct: This is true. Cookies can be used to track browser use, including pages visited, time spent on each page, and other interactions. This information can be used for various purposes, including website analytics, personalization, and advertising.
  

<br>

• Statement D: They act in the same way as a virus.
  
• Incorrect: Cookies do not act like viruses. Viruses are malicious software programs designed to replicate themselves and spread from one computer to another, potentially causing harm. Cookies, on the other hand, are not designed to damage, disrupt, or access information on users' computers unauthorizedly. They are merely data files and do not possess the capability to perform any operations like a virus.
  

<br>

Conclusion:

<br>

• Given the explanations above, Statement C is the only accurate description of internet cookies. They are indeed used to track browser use, but they are not limited to advertising, they are not spyware, nor do they act like viruses.
  

<br>

• Hence, the correct answer is option 3: (C) only.

Calculation:

Radius of the circle = d/2

and side of the triangle =  a = d

Ratio = area of the circle : area of the triangle 

⇒ πr² : √3/4×a²  

⇒ πd²/4 : √3/4×d²

⇒ π : √3

⇒ 22/7 : √3

⇒ 22 : 7√3

Hence, 22 : 7√3 is the correct answer.

• Correct Answer Explanation:
  
• Solar ponds utilize the concept of salt gradient to store heat energy. A solar pond is a body of water in which salt concentration increases with depth. This gradient prevents convection currents and allows the bottom layer to reach temperatures higher than the surface. Solar radiation is absorbed and trapped in the lower layers, effectively storing heat for energy production.
  

<br>

• Overview of Incorrect Options:
  
• Solar thermal collectors: These devices are designed to collect heat by absorbing sunlight. The main types include flat-plate collectors and concentrating collectors. They do not use a salt gradient to store heat; instead, they typically use water or another fluid to transfer heat.
  
• Solar cells: Also known as photovoltaic cells, these devices convert sunlight directly into electricity through the photovoltaic effect. They do not involve heat collection or the concept of a salt gradient.
  
• Solar kilns: These are structures designed for drying wood or other materials using solar heat. While they capture heat from the sun, they do not use a salt gradient for heat storage. Their design focuses on maximizing exposure to sunlight and controlling air flow for drying purposes.

• Statement (I) Explanation:
  
• This statement posits that every communication has two dimensions: content and relationships.
  
• The content aspect refers to the actual information or message conveyed, while the relationship aspect concerns how the message is delivered, which can influence the interpersonal dynamics between the sender and the receiver.
  
• This dual aspect is fundamental to understanding communication in a comprehensive manner, as it acknowledges not just what is said, but also how it is said and the implications thereof on the relationship between the involved parties.
  
• Hence, Statement (I) is correct.
  

<br>

• Statement (II) Explanation:
  
• This statement highlights the role of eye behavior (such as eye contact, gaze direction, blinking rate, etc.) in providing cues that go beyond the spoken word, a concept known as metacommunication.
  
• Metacommunication refers to all the non-verbal signals that accompany verbal communication, offering additional context, indicating emotional states, signaling relational intentions, and regulating interactions.
  
• Eye behavior is a critical element of non-verbal communication that can convey sincerity, interest, discomfort, or dominance, among other things, thereby enriching the communicative exchange with meta-level information.
  
• Hence, Statement (II) is correct.
  

<br>

Solution:

• Considering the explanations provided:
  
• Statement (I) is true as it accurately reflects the duality inherent in all forms of communication, emphasizing the importance of considering both what is said and the nature of the relationship between the communicator and the recipient.
  
• Statement (II) is also true, acknowledging the significance of non-verbal cues, specifically eye behavior, in enriching communication and providing insights that words alone might not convey.
  
• Therefore, the correct answer is option 1: Both Statement (I) and Statement (II) are true.

• Correct Answer: Fallacy of Composition
  
• Explanation: The fallacy of composition arises when one assumes that what is true for the individual parts must also be true for the whole. In this case, the argument incorrectly assumes that because ketchup and ice cream are liked individually, they would also be liked together as a combination. This fallacy overlooks the fact that the qualities making each component likable might not interact well when combined.
  

<br>

• Incorrect Options:
  
• Ad Hominem:
  
• Explanation: This fallacy occurs when the argument attacks a person's character or traits instead of addressing the argument itself. The statement about ketchup and ice cream does not attack anyone's character, making this option incorrect.
  
• Hasty Generalisation:
  
• Explanation: A hasty generalization is made when a broad conclusion is drawn from too few or unrepresentative examples. While the statement does make a broad assertion, it's not about generalizing from few examples but rather incorrectly assuming what's true for parts is true for the whole.
  
• Slippery Slope:
  
• Explanation: The slippery slope argument suggests that a relatively small first step leads to a chain of related events culminating in some significant impact. The statement about liking ketchup ice cream does not predict a chain of events, making this option incorrect.

Calculation:

Let the cost price of the article be Rs. 100x.

S.P. ⇒ 110/100 × 100x = Rs. 110x.

According to the question,

If sold for Rs. 26 more,

Profit ⇒ 15/100 × 100x = 15x 

S.P. = 115x 

⇒ 110x + 26 = 115x

⇒ 5x = 26

⇒ x = 5.2

Cost price = 100 × 5.2 ⇒ Rs. 520

∴ The correct answer is Rs. 520.

• Correct Answer: Positive interdependence
  
• Positive interdependence is a core element of cooperative learning where members of a group understand that they can succeed only if all members succeed. This concept embodies the "sink or swim together" philosophy, emphasizing that the success of each individual is linked to the success of the group as a whole.
  

<br>

• Incorrect Options:
  
• Individual Accountability:
  
• This element ensures that each member of a group is responsible for their own contribution and learning. While important, it does not directly relate to the idea of "sink or swim together" but rather focuses on ensuring each person is held accountable for their part.
  
• Promotive Interaction:
  
• This involves group members encouraging and supporting each other's efforts to achieve the group's goals. Although it fosters a supportive environment, it doesn't inherently imply the mutual dependency found in positive interdependence.
  
• Group Processing:
  
• Group processing involves reflecting on a group session to identify what was successful and what could be improved. This element focuses on the evaluation and improvement of group dynamics and efficiency, rather than the collective success or failure of the group.
  

<br>

Understanding these elements is crucial in implementing effective cooperative learning strategies, where the goal is not only individual achievement but also the success of the group as a whole. Positive interdependence is key to this as it integrates individual efforts into a collective outcome.

Solution:

<br>

• Statement (A) - Increased ability to generalize the facts: This statement is correct. During adolescence, individuals develop the ability to think more abstractly and apply general principles to a range of situations. They move beyond concrete thinking to more complex, abstract reasoning. Hence, Statement A is correct.
  

<br>

• Statement (B) - Development of memory and imagination: This statement is also correct. Adolescence is a period marked by significant growth in cognitive capabilities, including memory and imagination. Adolescents start to think more about possibilities and hypothetical scenarios, indicating an enhancement in imaginative capabilities. Hence, Statement B is correct.
  

<br>

• Statement (C) - Decreased ability to deal with abstraction: This statement is incorrect. Contrary to decreasing, an adolescent's ability to deal with abstract concepts actually increases. Adolescents begin to think more abstractly and can understand and manipulate abstract concepts without needing concrete objects. Hence, Statement C is incorrect.
  

<br>

• Statement (D) - Decreased ability to understand: This statement is incorrect. Adolescence is a period of significant cognitive development, including improvements in understanding complex and abstract ideas, not a decrease. Hence, Statement D is incorrect.
  

<br>

• Statement (E) - Increased ability to solve problems: This statement is correct. As adolescents develop, they acquire better problem-solving skills. They learn to consider multiple aspects of a situation and can devise more sophisticated solutions to problems. Hence, Statement E is correct.
  

<br>

Given the analysis above:

<br>

• The correct option is (2) (A), (B), and (E) only. These statements accurately reflect the characteristics of mental development in adolescents, indicating increased abilities in generalization, memory and imagination development, and problem-solving.
  

<br>

Therefore, the solution statement is: The correct answer is option 2, as Statements (A), (B), and (E) accurately describe the characteristics of mental development in adolescents, highlighting their increased ability to generalize facts, develop memory and imagination, and solve problems more effectively.

Solution:

<br>

• Understanding Statement (I): Ozone Depleting Substances (ODS) are indeed categorized into different classes based on their ozone depletion potential and other characteristics. Class I ODS include chemicals that have a higher potential to deplete the ozone layer, such as CFCs (Chlorofluorocarbons), Halons, Carbon Tetrachloride, and others. Class II ODS mainly consist of HCFCs (Hydrochlorofluorocarbons), which have a lower ozone depletion potential compared to Class I substances. Therefore, Statement (I) is correct.
  

<br>

• Understanding Statement (II): The statement regarding the cessation of production of Class II ODS (HCFCs) in 2000 is incorrect. According to the Montreal Protocol, which is a global agreement to protect the ozone layer by phasing out the production of substances that deplete it, the phase-out schedule for Class II ODS (HCFCs) was more gradual. For developed countries, the production and consumption of HCFCs were to be phased out by 2020 (with a complete ban by 2030), while for developing countries, the phase-out began in 2015, aiming for a complete ban by 2040. Therefore, the claim that production of Class II ODS ceased in 2000 is incorrect.
  

<br>

• Conclusion:
  
• Statement (I) is correct as it accurately describes the classification of Ozone Depleting Substances into Class I and Class II based on their characteristics and impact on the ozone layer.
  
• Statement (II) is incorrect because it inaccurately states the year when the production of Class II ODS ceased, not aligning with the phased schedule outlined in the Montreal Protocol.
  

<br>

• Hence, the correct answer is option 3: Statement (I) is correct but Statement (II) is incorrect.

The correct answer is 'Energy audit for every home and apartment should be mandatory in India'.

Key Points

• The idea that energy audits should be mandatory for every home and apartment in India is not mentioned anywhere in the passage.
• The passage does discuss the concept of energy audits and how they can help homeowners and renters identify energy inefficiencies in their homes and suggest solutions for saving energy.
• Energy audits, according to the passage, are performed by trained professionals who come into your home, assess its energy efficiency, and identify potential problems that might be causing energy inefficiency.
• These professionals look at things like insulation, construction flaws, and uneven heat distribution, and suggest ways to lower energy use and costs.
• The mentioned passage advocates the idea of conducting energy audits for the purpose of identifying energy inefficiencies and ways to mitigate them.
• However, it doesn't insist on making these audits mandatory, let alone specifically for homes and apartments in India.

Therefore, the correct option is 'Option 3'.

The correct answer is 'to fill the holes'.

Key Points

• 'Caulk' is a term used in construction and repair work, referring to the process of sealing cracks, gaps, or joints in various structures.
• In the context of the passage, caulking is recommended as a method to seal up old leaky windows to prevent drafts. This directly aligns with the meaning of 'filling the holes'.
• The purpose of caulking in this scenario is to improve the home's energy efficiency and reduce heating or cooling costs.
• By caulk, it suggests preventing cold drafts in winter or keeping the cool air from escaping in summer, thus minimizing the use of heating or air conditioning.
• The action of caulking contributes to the energy cost savings methods mentioned in the passage.

Therefore, the correct option is 'Option 3'.

The correct answer is '(B), (C), and (D) only.

Key Points

• According to the passage, an energy auditor is a professional who assesses the energy efficiency of a home.
• They do this by pinpointing the areas of the home that use the most energy and offering solutions to lower overall energy use and associated costs.
• As part of their assessment, they would check for construction flaws which could be contributing to energy inefficiency.
• The passage also states that uneven heat distribution is another potential issue they might identify during their audit.
• Thus, based on the passage, an energy auditor would perform functions B, C, and D.

Therefore, the correct option is 'Option 4'.

The correct answer is 'are energy efficient'.

Key Points

• According to the passage, the context in which double-paned windows are mentioned relates to energy cost savings and efficiency. It implicitly suggests that these types of windows are energy-efficient.
• The passage states that one can "choose double-paned windows if you're building an addition or replacing old windows", due to their ability to help save energy, and by extension, reduce costs.
• Double-paned windows typically consist of two sheets of glass with a space in between, which creates an insulating barrier. This setup helps to maintain a comfortable interior temperature, thus reducing the load on heating or cooling systems and making these windows energy efficient.

Therefore, the correct option is 'Option 4'.

The correct answer is 'Consume more energy'.

Key Points

• The passage points out that when it's time to replace old appliances, it's smart to purchase energy-efficient models, which inherently implies that old appliances consume more energy.
• The reference to 'energy-saving settings' on current appliances underscores the idea that energy efficiency is a significant concern, leading one to infer that older appliances might not be as energy-efficient.
• By advocating for the upgrade to more energy-efficient appliances, the passage indicates that these older models are likely less efficient and thus consume more energy.

Therefore, the correct option is 'Option 1'.

• Statement (I) Explanation:
  
• Cross-Sectional research involves looking at data from a population at one specific point in time. The main objective is to analyze data at a specific moment to find patterns or correlations among variables.
  
• It does not study the same population over time as suggested in the statement. Instead, longitudinal studies are the ones that follow the same population over a period of time to observe changes.
  
• Hence, Statement (I) is incorrect.
  

<br>

• Statement (II) Explanation:
  
• A retrospective study is a type of research that looks back at events that have already occurred. It often relies on historical data, medical records, and participants' recollections or memories of past events.
  
• This method is particularly used in the medical field to study the outcomes or causes of diseases by examining existing data or by asking participants to recall past experiences.
  
• Hence, Statement (II) is correct.
  

<br>

• Conclusion:
  
• Since Statement (I) is incorrect because it inaccurately describes Cross-Sectional research, and Statement (II) is correct as it accurately describes the nature of retrospective studies,
  
• The correct answer is option 4 (Statement (I) is false but Statement (II) is true).