Search Previous Year Questions

Given Word:

AMBLERS

Rule:

• Each vowel is changed to the next letter in the English alphabet.
• Each consonant is changed to the previous letter in the English alphabet.

Transformation:

New group of letters:

B, L, A, K, F, Q, R

Every letter appears only once.

Therefore, the number of letters appearing exactly twice = 0.

Hence, the correct answer is "Option 2 — Zero".

The logic followed here is

Logic: The letters of the second cluster are obtained by adding 1 to the positional values of the corresponding letters of the first cluster in English alphabetical order.

Option 1)  MG - NH,

Option 2) QK - RL,

Option 3) JD - LE

This pair does not follow the rule.

Option 4) HB - IC,

Therefore, the letter-cluster pair that is different from the others is JD - LE.

Hence, the correct answer is 'Option 3'.

The logic followed here is to arrange the people based on the given directions in a single row facing North.

1. Only three people sit between D and J.
2. L sits to the immediate left of J.
3. No one sits to the right of K.
4. Only two people sit between K and L.
5. C sits to the immediate right of E.

Final Arrangement:

We need to find how many people sit between F and C.

Between C (3^rd) and F (6^th), the people sitting are L and J.

Total number of people = 2.

Hence, the correct answer is "Option 2".

The logic followed in this pattern is based on alphabetical shifts by subtracting a constant value from the positional value of each letter.

For 'POK' related to 'GFB':

For 'FEA' related to 'WVR':

Applying the same logic to 'WVR':

Thus, WVR is related to NMI using the same pattern.

Hence, the correct answer is 'Option 1'.

The logic followed here is

Logic: First letter of the first cluster + 4 = First letter of the second cluster; Second letter of the first cluster + 4 = Second letter of the second cluster.

Option 1) MP − RT,

M + 5 = R and P + 4 = T. This pair does not follow the (+4, +4) rule.

Option 2) QT − UX,

Option 3) JM − NQ,

Option 4) PS − TW,

Therefore, the letter-cluster pair that is different from the others is MP − RT.

Hence, the correct answer is "Option 1".

The correct answer is Cyclohexane.

Key Points

• Cyclohexane is an alicyclic hydrocarbon belonging to the cycloalkane series, characterized by a closed-ring structure.
• The molecular formula C₆H₁₂ follows the general formula for cycloalkanes, which is C_nH_2n.
• Each of the six carbon atoms in the ring is sp³ hybridized, forming sigma bonds with two adjacent carbon atoms and two hydrogen atoms.
• Because all carbon-carbon bonds are single bonds, cyclohexane is classified as a saturated hydrocarbon.
• To maintain the tetrahedral bond angle of approximately 109.5 degrees and minimize ring strain, it adopts non-planar conformations, the most stable being the chair conformation.
• It is widely used in the industrial production of nylon precursors like adipic acid and caprolactam.

 Additional Information

• Benzene:
• It is a cyclic and aromatic hydrocarbon with the molecular formula C₆H₆.
• It features a planar hexagonal ring with a delocalized pi-electron system and alternating double bonds.
• Hexane:
• It is an acyclic or straight-chain alkane with the molecular formula C₆H₁₄.
• It follows the general formula C_nH_2n+2 and does not contain a ring structure.
• Butane:
• It is an alkane with four carbon atoms and the molecular formula C₄H₁₀.
• It is an open-chain hydrocarbon commonly utilized as a component of Liquefied Petroleum Gas (LPG).

The correct answer is 2.

Key Points

• Hydrochloric acid (HCl) is a strong monoprotic acid, which means it undergoes complete dissociation in an aqueous solution to release hydrogen ions [H⁺].
• For a 0.01 M HCl solution, the concentration of hydrogen ions is equal to the concentration of the acid itself, which is 0.01 moles per liter or 10⁻² M.
• The pH scale was developed by Søren Sørensen in 1909 as a way to quantify the acidity or alkalinity of a substance using a logarithmic scale.
• The mathematical formula used to calculate the pH is pH = −log₁₀[H⁺], where [H⁺] represents the molar concentration of hydrogen ions.
• By substituting the value, we calculate pH = −log₁₀(0.01). Since 0.01 is 10⁻², the logarithm of 10⁻² is −2.
• The final calculation, −(−2), results in a pH value of 2, indicating that the solution is highly acidic.

 Additional Information

• Characteristics of the pH Scale:
• The pH scale typically ranges from 0 to 14 at standard room temperature (25°C).
• A pH of 7 is defined as neutral, which is the value for pure water where the concentration of H⁺ equals OH⁻.
• Values less than 7 signify acidity, while values greater than 7 signify basicity or alkalinity.
• Concentration and Strength:
• Molarity (M) is the unit of concentration representing the number of moles of solute per liter of solution.
• Strong acids like HCl, H₂SO₄, and HNO₃ have extremely high acid dissociation constants (K_a), unlike weak acids like citric acid.
• The pH of human gastric juice is approximately 1.5 to 3.5, which closely aligns with the acidity of a 0.01 M to 0.1 M hydrochloric acid solution.

The correct answer is Compression (C).

Key Points

• Sound is a mechanical wave that requires a physical medium like air, water, or solids for its propagation. It travels specifically as a longitudinal wave, where the particles of the medium oscillate parallel to the direction of energy transport.
• When a vibrating object moves forward, it exerts a mechanical force on the surrounding air particles, pushing them closer together. This localized increase in particle density leads to a corresponding increase in pressure.
• This specific region of high pressure and high density is scientifically termed as Compression (C). On a graphical representation of a sound wave, compressions are depicted as the crests or peaks.
• The transmission of sound is essentially the movement of these pressure variations through the medium. The vibrating object creates a series of compressions and rarefactions that travel away from the source at the speed of sound (approximately 343 meters per second in dry air at 20 degrees Celsius).
• The amount of pressure in a compression is directly related to the amplitude of the sound wave, which determines the loudness perceived by the human ear.

 Additional Information

• Rarefaction (R):
• This is the region of low pressure created when the vibrating object moves backward, allowing air particles to spread out.
• It is characterized by minimum density and serves as the troughs in a wave diagram.
• Transverse wave:
• Unlike sound in air, these waves involve particle displacement perpendicular to the direction of wave motion.
• Common examples include electromagnetic waves and waves generated on a vibrating string.
• Medium Boundary:
• This represents the physical limit where one medium ends and another begins.
• At this junction, sound energy can undergo reflection (echoes), refraction (bending), or transmission into the second medium.

The correct answer is Almost a day.

Key Points

• Ovulation is the biological process where a mature oocyte (egg) is released from the Graafian follicle of the ovary into the Fallopian tube.
• Once released, the egg remains viable for fertilization for a very limited window, typically lasting between 12 to 24 hours. This timeframe aligns with the description of almost a day.
• The egg moves through the ampulla of the Fallopian tube, which is the primary site where fertilization by sperm occurs.
• If the egg is not fertilized within this 24-hour period, it begins to undergo apoptosis (programmed cell death) and loses its metabolic activity.
• Following its degradation, the unfertilized egg is eventually absorbed by the body or shed along with the uterine lining (endometrium) during the menstrual phase of the cycle.

 Additional Information

• Hormonal Triggers:
• The release of the egg is triggered by a sharp rise in Luteinizing Hormone (LH), known as the LH surge, which occurs approximately 14 days before the start of the next period.
• Estrogen levels rise before ovulation to prepare the cervical mucus, making it more hospitable for sperm survival.
• Reproductive Longevity:
• While the egg survives for only one day, human sperm can survive inside the female reproductive tract for 3 to 5 days.
• This difference in longevity creates a fertile window of about 6 days, during which intercourse can lead to pregnancy even if it occurs several days before ovulation.
• Post-Ovulation Phase:
• After the egg is released, the empty follicle transforms into the Corpus Luteum, which secretes Progesterone to thicken the endometrium for possible implantation.

The correct answer is Decomposers.

Key Points

• Decomposers are specialized organisms, predominantly fungi and bacteria, that perform the vital function of breaking down complex organic matter from dead remains and nitrogenous wastes.
• They utilize enzymes to decompose organic molecules into simpler inorganic forms, such as carbon dioxide, water, and nutrients like nitrogen and phosphorus.
• By returning these essential elements to the soil, decomposers ensure nutrient cycling, which maintains soil fertility and allows autotrophs to thrive.
• In the trophic structure, they occupy a unique position as they process energy from all levels once the organisms die, effectively acting as the recycling unit of the biosphere.

 Additional Information

• Producers:
• Identified as autotrophs, these organisms, including green plants and cyanobacteria, synthesize their own organic food using sunlight via photosynthesis.
• They represent the base of the ecological pyramid.
• Consumers:
• These are heterotrophs that cannot manufacture food and must ingest other organisms.
• They include herbivores (primary), carnivores (secondary/tertiary), and omnivores.
• Parasites:
• Organisms that sustain themselves by living on or within a host organism, often causing pathogenic effects or nutritional depletion.
• Examples include Plasmodium, leeches, and Cuscuta plants.