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The Correct answer is Option 3.

Key Points

• Law of conservation of mass: Dalton's theory states that atoms are indivisible and cannot be created or destroyed in chemical reactions, supporting the conservation of mass.
• Law of constant composition: According to Dalton, a given compound always contains the same types of atoms in fixed ratios, explaining this law.
• Law of multiple proportions: Dalton's theory explains that when two elements form multiple compounds, the ratios of the masses of one element to the fixed mass of the other are small whole numbers.
• However, Dalton's atomic theory does not address radioactivity, as it was discovered later. Hence, option 3 is correct.

The Correct answer is Option 1. 

Key Points

• A technopolis is a specialized urban area or region designed to promote and house high-tech industries, innovation, and research.
• It typically integrates cutting-edge infrastructure, technology hubs, research institutions, and a business-friendly environment to attract technology-driven companies, startups, and professionals.
• Key Features of a Technopolis:
• High-Tech Industries: Focus on sectors like IT, biotechnology, electronics, aerospace, and robotics.
• R&D Facilities: Includes universities, laboratories, and research centers for innovation.
• Modern Infrastructure: Equipped with advanced communication systems, transportation, and utilities.
• Collaborative Environment: Encourages partnerships between academia, industries, and governments.
• Economic Growth Hub: Often serves as a catalyst for regional economic development.
• Examples:
• Silicon Valley, USA
• Tsukuba Science City, Japan
• Sophia Antipolis, France
• Bangalore, India (referred to as India's Silicon Valley). Hence, option 1 is correct.
• A technopolis fosters technological advancements and contributes significantly to the knowledge-based economy.

The Correct answer is Option 4. 

Key Points

• The acid secreted in the stomach is hydrochloric acid (HCl). Hence, option 4 is correct.
• Hydrochloric acid (HCl) is produced by the parietal cells (also known as oxyntic cells) in the stomach lining.
• It plays a crucial role in digestion by:
• Breaking down food.
• Activating the enzyme pepsin from its inactive form, pepsinogen.
• Killing harmful microbes ingested with food.

The Correct answer is Option 2. 

Key Points

• During the time of Harsha (606–647 CE), Assam was ruled by the Varman dynasty, specifically Bhaskara varman, who was a contemporary of Harsha. Hence, option 2 is correct.
• Bhaskaravarman was the most prominent ruler of the Varman dynasty of Assam.
• He ruled over the kingdom of Kamarupa (modern-day Assam).
• Bhaskaravarman is known for his alliance with Harsha and played a significant role in the Kannauj Assembly hosted by Harsha.
• The historical records of Bhaskaravarman are mentioned in Bana Bhatta’s Harshacharita and the Chinese traveler Xuanzang's accounts.
• Thus, Bhaskaravarman was the ruler of Assam during Harsha’s reign.

The Correct answer is Option 4. 

Key Points

• The Chennai-Andaman and Nicobar Islands (CANI) undersea cable project was inaugurated and dedicated to the nation by Prime Minister Narendra Modi on August 10, 2020. Hence, option 4 is correct.
• Chennai-Andaman and Nicobar Islands (CANI):
• The project connects Chennai to the Andaman and Nicobar Islands via a 2,312 km-long submarine optical fiber cable.
• It enhances digital connectivity in the islands, enabling high-speed internet and improved telecommunications.
• The project supports the development of e-governance, tourism, and local businesses, boosting overall socio-economic growth in the region.

The Correct answer is Option 4. 

Key Points

• The meter used to measure the distance moved by a vehicle is known as an odometer. Hence, option 4 is correct.
• The odometer is a device in vehicles that records the total distance traveled.
• It is usually displayed on the dashboard and is calibrated in units such as kilometers or miles.
• Modern vehicles often combine the odometer with other features like trip meters, which can be reset to measure specific distances for a journey.
• Ammeter:
• Function: Measures electric current in a circuit.
• Unit: Amperes (A).
• Use: Commonly used in electrical and electronic circuits to monitor current flow.
• Speedometer:
• Function: Measures the speed of a moving vehicle.
• Unit: Kilometers per hour (km/h) or miles per hour (mph).
• Use: Found in vehicles to inform the driver of their current speed.
• Chronometer:
• Function: A highly precise instrument used to measure time.
• Use: Originally used in navigation to determine longitude at sea; modern chronometers are used in scientific and timekeeping applications.

The Correct answer is Option 4. 

Key Points

• The 104^th Constitutional Amendment Act, 2019 abolished the two seats that were reserved for the Anglo-Indian community in the Lok Sabha and State Legislative Assemblies. Hence, option 4 is correct.
• This amendment ended the provision for nomination of Anglo-Indians under Article 331 (for Lok Sabha) and Article 333 (for State Assemblies).
• The reservation for Anglo-Indians was originally intended as a temporary measure after independence and was extended several times.
• The 104^th Amendment came into effect on January 25, 2020, marking the end of this special representation.

The Correct answer is Option 1. 

Key Points First We need to Understand through logic 

In  Figure : 

⇒ Difference between upper Two digits is equal to difference between below Two Digits 

⇒ 21 - 16 = 5 , 15 - 10 = 5 (Both Equal)

⇒ 10 - 7 = 3 , 13 - 10 = 3 

⇒ Hence 21 - 14 = 7 , Means Difference between upper digit in last figure also be same 

⇒ ? - 15 = 7 ⇒ ? = 22 

Hence Option 1 is correct.

The Correct answer is Option 4. 

Key Points

• The artificial port in India is Chennai Port. Hence, option 4 is correct.
• Chennai Port is an artificial harbor constructed by modifying the natural coastline. It is one of the oldest and largest ports in India, located on the Coromandel Coast of Tamil Nadu.
• It contrasts with natural ports like Mumbai Port or Kochi Port, which are naturally deep and sheltered harbors.
• Artificial ports are built using engineering structures like breakwaters to create safe harbors for ships.

The Correct answer is Option 3. 

Key Points

• In April 2024, the United Nations Security Council voted on a proposal to grant Palestine full UN membership.
• The resolution received 12 votes in favor, with the United States casting a veto, and two members—Switzerland and the United Kingdom—abstaining.
• Therefore, a total of three members either rejected or abstained from voting on the proposal:
• United States: Vetoed the resolution.
• Switzerland: Abstained from voting.
• United Kingdom: Abstained from voting. Hence, option 3 is correct.
• For a resolution to pass in the Security Council, it requires at least nine votes in favor and no vetoes from any of the five permanent members. In this case, the U.S. veto prevented the adoption of the resolution, blocking Palestine's bid for full UN membership.