Q. What is the function of the style in a flower? (2023)
A.
To support the anther
B.
To connect stigma and ovary
C.
To attract pollinators
D.
To produce nectar
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Solution
The style is the slender stalk that connects the stigma to the ovary, allowing pollen to travel to the ovules.
Correct Answer: B — To connect stigma and ovary
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Q. What is the function of the synaptic cleft? (2022)
A.
To transmit electrical impulses
B.
To separate two neurons
C.
To store neurotransmitters
D.
To protect the neuron
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Solution
The synaptic cleft is the small gap between two neurons where neurotransmitters are released to facilitate communication.
Correct Answer: B — To separate two neurons
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Q. What is the function of the Taq polymerase in PCR? (2023)
A.
To cut DNA
B.
To synthesize DNA
C.
To ligate DNA fragments
D.
To denature DNA
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Solution
Taq polymerase is a heat-stable enzyme used in PCR to synthesize new DNA strands by extending primers during the amplification process.
Correct Answer: B — To synthesize DNA
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Q. What is the function of the villi in the small intestine? (2019)
A.
Increase surface area for absorption
B.
Secrete digestive enzymes
C.
Produce bile
D.
Store nutrients
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Solution
Villi increase the surface area of the small intestine, enhancing nutrient absorption.
Correct Answer: A — Increase surface area for absorption
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Q. What is the function of the xylem in flowering plants? (2023)
A.
Transport of nutrients
B.
Transport of water
C.
Photosynthesis
D.
Storage of food
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Solution
Xylem is responsible for the transport of water and minerals from the roots to the rest of the plant.
Correct Answer: B — Transport of water
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Q. What is the function of villi in the small intestine? (2019)
A.
Secretion of enzymes
B.
Absorption of nutrients
C.
Production of bile
D.
Storage of food
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Solution
Villi increase the surface area of the small intestine, enhancing the absorption of nutrients.
Correct Answer: B — Absorption of nutrients
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Q. What is the functional unit of the lung where gas exchange occurs? (2019)
A.
Bronchi
B.
Alveoli
C.
Trachea
D.
Larynx
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Solution
Alveoli are the tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
Correct Answer: B — Alveoli
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Q. What is the general electronic configuration of alkali metals? (2022)
A.
ns^1
B.
ns^2
C.
ns^2np^1
D.
ns^2np^2
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Solution
The general electronic configuration of alkali metals is ns^1, where n is the principal quantum number.
Correct Answer: A — ns^1
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Q. What is the general formula for aldehydes? (2023)
A.
C_nH_(2n)
B.
C_nH_(2n+1)CHO
C.
C_nH_(2n+2)
D.
C_nH_(2n-1)CHO
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Solution
The general formula for aldehydes is C_nH_(2n+1)CHO, where n is the number of carbon atoms.
Correct Answer: B — C_nH_(2n+1)CHO
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Q. What is the genetic material in most living organisms? (2023)
A.
RNA
B.
DNA
C.
Protein
D.
Carbohydrate
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Solution
DNA (deoxyribonucleic acid) is the genetic material that carries the instructions for life.
Correct Answer: B — DNA
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Q. What is the gravitational field strength (g) at a distance r from the center of a planet of mass M? (2023)
A.
GM/r^2
B.
GM/r
C.
GMr^2
D.
G/Mr^2
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Solution
The gravitational field strength at a distance r from the center of a planet is given by g = GM/r^2.
Correct Answer: A — GM/r^2
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Q. What is the gravitational field strength at a distance r from a mass M? (2022)
A.
GM/r
B.
GM/r^2
C.
Gm/r^2
D.
Gm/r
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Solution
The gravitational field strength (g) at a distance r from a mass M is given by g = GM/r^2.
Correct Answer: B — GM/r^2
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Q. What is the gravitational potential energy of a 2 kg mass at a height of 10 m above the ground? (Take g = 9.8 m/s²) (2023)
A.
196 J
B.
98 J
C.
20 J
D.
78 J
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Solution
Gravitational potential energy (U) = mgh = 2 kg * 9.8 m/s² * 10 m = 196 J.
Correct Answer: A — 196 J
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Q. What is the ground state electron configuration of an oxygen atom? (2023)
A.
1s² 2s² 2p⁴
B.
1s² 2s² 2p²
C.
1s² 2s² 2p⁶
D.
1s² 2s¹ 2p⁵
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Solution
Oxygen has 8 electrons, and its ground state electron configuration is 1s² 2s² 2p⁴.
Correct Answer: A — 1s² 2s² 2p⁴
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Q. What is the hydrostatic pressure at a depth of 10 meters in water? (Density of water = 1000 kg/m³, g = 9.81 m/s²) (2022)
A.
9810 Pa
B.
10000 Pa
C.
98100 Pa
D.
1000 Pa
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Solution
Hydrostatic pressure is given by P = ρgh. Thus, P = 1000 kg/m³ * 9.81 m/s² * 10 m = 98100 Pa.
Correct Answer: C — 98100 Pa
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Q. What is the ionization energy of an atom? (2023)
A.
Energy required to remove an electron
B.
Energy released when an electron is added
C.
Energy required to excite an electron
D.
Energy required to split the nucleus
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Solution
Ionization energy is defined as the energy required to remove an electron from an atom in its gaseous state.
Correct Answer: A — Energy required to remove an electron
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Q. What is the ionization energy of hydrogen in eV? (2019)
A.
1.51 eV
B.
13.6 eV
C.
3.4 eV
D.
10.2 eV
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Solution
The ionization energy of hydrogen is 13.6 eV, which is the energy required to remove the electron from the ground state.
Correct Answer: B — 13.6 eV
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Q. What is the IUPAC name for CH3-CH2-CH2-CHO? (2020)
A.
Butanal
B.
Propanal
C.
Pentanal
D.
Hexanal
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Solution
The IUPAC name for CH3-CH2-CH2-CHO is Butanal, as it has a four-carbon chain with an aldehyde functional group.
Correct Answer: A — Butanal
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Q. What is the IUPAC name for CH3-CH2-CH2-COOH? (2020)
A.
Butanoic acid
B.
Propanoic acid
C.
Pentanoic acid
D.
Hexanoic acid
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Solution
The IUPAC name for CH3-CH2-CH2-COOH is Butanoic acid, as it has four carbon atoms.
Correct Answer: A — Butanoic acid
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Q. What is the IUPAC name of the carboxylic acid with the formula C3H6O2? (2023)
A.
Propanoic acid
B.
Butanoic acid
C.
Acetic acid
D.
Formic acid
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Solution
The IUPAC name of C3H6O2 is Propanoic acid, which has a three-carbon chain.
Correct Answer: A — Propanoic acid
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Q. What is the jelly-like substance inside the cell called? (2018)
A.
Nucleoplasm
B.
Cytoplasm
C.
Protoplasm
D.
Chloroplast
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Solution
Cytoplasm is the jelly-like substance that fills the cell and contains organelles.
Correct Answer: B — Cytoplasm
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Q. What is the least count of a standard vernier caliper? (2021)
A.
0.01 cm
B.
0.1 cm
C.
1 cm
D.
0.001 cm
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Solution
The least count of a standard vernier caliper is typically 0.01 cm.
Correct Answer: A — 0.01 cm
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Q. What is the least count of a vernier caliper that can measure up to 0.01 cm? (2021)
A.
0.1 cm
B.
0.01 cm
C.
0.001 cm
D.
1 cm
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Solution
The least count of a vernier caliper is the smallest measurement it can accurately read, which is 0.01 cm in this case.
Correct Answer: B — 0.01 cm
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Q. What is the magnetic field inside a toroidal solenoid? (2023)
A.
Zero
B.
Uniform and non-zero
C.
Varies with position
D.
Depends on the current only
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Solution
The magnetic field inside a toroidal solenoid is uniform and non-zero, and it is given by B = (μ₀NI)/(2πr), where N is the number of turns, I is the current, and r is the distance from the center.
Correct Answer: B — Uniform and non-zero
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Q. What is the magnetic field strength at a distance 'r' from a long straight conductor carrying current 'I'? (2020)
A.
μ₀I/2πr
B.
μ₀I/4πr
C.
2μ₀I/πr
D.
μ₀I/πr
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Solution
The magnetic field strength (B) at a distance 'r' from a long straight conductor is given by the formula B = μ₀I/2πr.
Correct Answer: A — μ₀I/2πr
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Q. What is the magnetic moment of a circular loop of radius r carrying a current I? (2021)
A.
πr²I
B.
2πrI
C.
Ir²
D.
πrI
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Solution
The magnetic moment (μ) of a circular loop is given by μ = I × A, where A is the area of the loop. For a circular loop, A = πr², thus μ = I × πr² = πr²I.
Correct Answer: A — πr²I
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Q. What is the magnification produced by a concave mirror if the object distance is 10 cm and the image distance is 5 cm? (2019)
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Solution
Magnification (m) = -v/u. Here, v = -5 cm and u = -10 cm, so m = -(-5)/(-10) = 2.
Correct Answer: C — 2
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Q. What is the magnification produced by a concave mirror when the object is placed at the focus? (2019)
A.
1
B.
0
C.
Infinity
D.
Less than 1
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Solution
When the object is placed at the focus of a concave mirror, the image is formed at infinity, leading to infinite magnification.
Correct Answer: C — Infinity
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Q. What is the main advantage of asexual reproduction? (2023)
A.
Genetic diversity
B.
Faster population growth
C.
Requires two parents
D.
Involves gametes
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Solution
Asexual reproduction allows for faster population growth since it does not require finding a mate.
Correct Answer: B — Faster population growth
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Q. What is the main advantage of sexual reproduction? (2023)
A.
Faster reproduction
B.
Genetic variation
C.
Less energy required
D.
No need for a mate
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Solution
Sexual reproduction promotes genetic variation, which is beneficial for adaptation and evolution.
Correct Answer: B — Genetic variation
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