Q. In flowering plants, the ovary develops into which structure after fertilization? (2023)
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A.
Seed
-
B.
Fruit
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C.
Flower
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D.
Leaf
Solution
After fertilization, the ovary develops into a fruit, which contains the seeds.
Correct Answer: B — Fruit
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Q. In flowering plants, the process of fusion of male and female gametes is known as? (2019)
-
A.
Pollination
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B.
Fertilization
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C.
Germination
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D.
Seed dispersal
Solution
Fertilization is the process where the male gamete (pollen) fuses with the female gamete (ovule) to form a zygote.
Correct Answer: B — Fertilization
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Q. In flowering plants, the process of pollination involves the transfer of pollen from the ____ to the ____. (2019)
-
A.
Ovary, Stigma
-
B.
Anther, Stigma
-
C.
Stigma, Ovary
-
D.
Filament, Anther
Solution
Pollination is the transfer of pollen from the anther (male part) to the stigma (female part) of a flower.
Correct Answer: B — Anther, Stigma
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Q. In flowering plants, the process of pollination involves the transfer of pollen from the anther to the: (2021)
-
A.
Ovary
-
B.
Style
-
C.
Stigma
-
D.
Sepal
Solution
Pollination is the transfer of pollen from the anther to the stigma of a flower, which is essential for fertilization.
Correct Answer: C — Stigma
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Q. In fluid mechanics, what does the term 'streamline' refer to? (2020)
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A.
Path of a fluid particle
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B.
Layer of fluid
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C.
Viscous flow
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D.
Turbulent flow
Solution
A streamline refers to the path followed by a fluid particle in a steady flow.
Correct Answer: A — Path of a fluid particle
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Q. In humans, the allele for brown eyes (B) is dominant over the allele for blue eyes (b). What is the genotype of a person with blue eyes? (2019)
Solution
A person with blue eyes must have the genotype bb, as blue is recessive.
Correct Answer: C — bb
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Q. In measurements, what does the term 'precision' refer to? (2022)
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A.
Closeness to the true value
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B.
Consistency of repeated measurements
-
C.
Range of values
-
D.
Average of measurements
Solution
Precision refers to the consistency of repeated measurements, regardless of their accuracy.
Correct Answer: B — Consistency of repeated measurements
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Q. In Mendel's experiments, which trait was observed to be dominant in pea plants? (2018)
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A.
Green seed color
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B.
Yellow seed color
-
C.
Wrinkled seeds
-
D.
Short plants
Solution
In Mendel's experiments, yellow seed color was observed to be the dominant trait in pea plants.
Correct Answer: B — Yellow seed color
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Q. In Mendel's experiments, which trait was observed to be dominant over the other? (2018)
-
A.
Green seed color
-
B.
Yellow seed color
-
C.
Round seed shape
-
D.
Wrinkled seed shape
Solution
In Mendel's experiments, yellow seed color was observed to be dominant over green seed color.
Correct Answer: B — Yellow seed color
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Q. In nuclear fission, the mass of the products is less than the mass of the reactants. What is this mass difference called? (2019)
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A.
Nuclear mass
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B.
Binding energy
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C.
Mass defect
-
D.
Fission energy
Solution
The mass difference in nuclear fission is referred to as the mass defect, which is converted into energy according to Einstein's equation E=mc².
Correct Answer: C — Mass defect
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Q. In nuclear fission, the mass of the products is less than the mass of the reactants. What is this mass difference converted into? (2019)
-
A.
Kinetic energy
-
B.
Potential energy
-
C.
Binding energy
-
D.
Radiation
Solution
The mass difference in nuclear fission is converted into kinetic energy of the fission fragments, according to Einstein's equation E=mc².
Correct Answer: A — Kinetic energy
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Q. In nuclear fission, what is released as a result of the reaction? (2022)
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A.
Energy and neutrons
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B.
Only energy
-
C.
Only neutrons
-
D.
Protons and electrons
Solution
Nuclear fission releases a significant amount of energy and additional neutrons, which can induce further fission reactions.
Correct Answer: A — Energy and neutrons
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Q. In nuclear fission, what is released? (2022)
-
A.
Energy and neutrons
-
B.
Only energy
-
C.
Only neutrons
-
D.
Protons and electrons
Solution
Nuclear fission releases a significant amount of energy and additional neutrons, which can induce further fission reactions.
Correct Answer: A — Energy and neutrons
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Q. In plants, which structure is primarily responsible for asexual reproduction? (2023)
-
A.
Roots
-
B.
Leaves
-
C.
Stems
-
D.
Flowers
Solution
Stems, particularly in the form of runners or tubers, are primarily responsible for asexual reproduction in many plants.
Correct Answer: C — Stems
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Q. In plants, which structure is responsible for sexual reproduction? (2021)
-
A.
Roots
-
B.
Leaves
-
C.
Flowers
-
D.
Stems
Solution
Flowers are the reproductive structures in plants that facilitate sexual reproduction.
Correct Answer: C — Flowers
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Q. In the context of atomic structure, what does the term 'isotope' refer to? (2021)
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A.
Atoms with the same number of protons but different neutrons
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B.
Atoms with different numbers of protons
-
C.
Atoms with the same mass number
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D.
Atoms that are chemically identical
Solution
Isotopes are defined as atoms that have the same number of protons but different numbers of neutrons.
Correct Answer: A — Atoms with the same number of protons but different neutrons
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Q. In the context of atomic structure, what does the term 'quantum leap' refer to? (2022)
-
A.
Movement of electrons in a circular path
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B.
Transition of an electron between energy levels
-
C.
Emission of light
-
D.
Absorption of energy
Solution
A 'quantum leap' refers to the transition of an electron between discrete energy levels in an atom.
Correct Answer: B — Transition of an electron between energy levels
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Q. In the context of measurements, what does precision refer to? (2022)
-
A.
Closeness to the true value
-
B.
Consistency of repeated measurements
-
C.
Range of values
-
D.
Average of measurements
Solution
Precision refers to the consistency of repeated measurements, regardless of their accuracy.
Correct Answer: B — Consistency of repeated measurements
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Q. In the context of surface chemistry, what does the term 'adsorption' refer to? (2022)
-
A.
The process of a substance being taken up by a liquid
-
B.
The process of a substance adhering to a surface
-
C.
The process of a substance dissolving in a solvent
-
D.
The process of a substance being absorbed into a solid
Solution
Adsorption refers to the process where molecules adhere to the surface of a solid or liquid, forming a film.
Correct Answer: B — The process of a substance adhering to a surface
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Q. In the context of surface chemistry, what does the term 'desorption' mean? (2023)
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A.
The process of adsorption
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B.
The release of adsorbed molecules from a surface
-
C.
The absorption of a gas into a liquid
-
D.
The formation of a solid from a gas
Solution
Desorption refers to the process where adsorbed molecules are released from the surface back into the gas or liquid phase.
Correct Answer: B — The release of adsorbed molecules from a surface
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Q. In the context of surface chemistry, what does the term 'desorption' refer to? (2022)
-
A.
The process of adsorption
-
B.
The release of adsorbate from the surface
-
C.
The formation of a new layer
-
D.
The increase in surface area
Solution
Desorption refers to the process by which an adsorbate is released from the surface of the adsorbent.
Correct Answer: B — The release of adsorbate from the surface
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Q. In the electrochemical cell, what occurs at the anode? (2022)
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A.
Reduction
-
B.
Oxidation
-
C.
Neutralization
-
D.
Precipitation
Solution
At the anode of an electrochemical cell, oxidation occurs, which involves the loss of electrons.
Correct Answer: B — Oxidation
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Q. In the electrochemical cell, which electrode is the site of reduction? (2023)
-
A.
Anode
-
B.
Cathode
-
C.
Salt bridge
-
D.
Electrolyte
Solution
In an electrochemical cell, the cathode is the electrode where reduction occurs.
Correct Answer: B — Cathode
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Q. In the electrochemical series, which element is the best reducing agent? (2022)
Solution
Li is the best reducing agent among the given alkali metals due to its low ionization energy.
Correct Answer: A — Li
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Q. In the electrochemical series, which of the following has the highest reduction potential? (2022)
-
A.
Li+
-
B.
Na+
-
C.
K+
-
D.
F+
Solution
Fluorine (F+) has the highest reduction potential in the electrochemical series, indicating it is a strong oxidizing agent.
Correct Answer: D — F+
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Q. In the hydrogen atom, which transition would emit the photon with the highest energy? (2019)
-
A.
n=2 to n=1
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B.
n=3 to n=2
-
C.
n=4 to n=3
-
D.
n=5 to n=4
Solution
The energy of the emitted photon is highest for the transition from n=2 to n=1, as it involves the largest energy difference.
Correct Answer: A — n=2 to n=1
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Q. In the kinetic theory of gases, the temperature of a gas is a measure of: (2022)
-
A.
The average potential energy of the molecules
-
B.
The average kinetic energy of the molecules
-
C.
The total energy of the gas
-
D.
The number of molecules in the gas
Solution
In the kinetic theory of gases, the temperature of a gas is a measure of the average kinetic energy of the molecules.
Correct Answer: B — The average kinetic energy of the molecules
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Q. In the kinetic theory of gases, the term 'elastic collision' means: (2019)
-
A.
Kinetic energy is conserved
-
B.
Momentum is conserved
-
C.
Both kinetic energy and momentum are conserved
-
D.
Neither kinetic energy nor momentum is conserved
Solution
In elastic collisions, both kinetic energy and momentum are conserved, which is a key assumption in the kinetic theory of gases.
Correct Answer: C — Both kinetic energy and momentum are conserved
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Q. In the kinetic theory, the internal energy of an ideal gas is primarily due to:
-
A.
Potential energy
-
B.
Kinetic energy of molecules
-
C.
Work done on the gas
-
D.
Heat energy
Solution
In an ideal gas, the internal energy is primarily due to the kinetic energy of the gas molecules, as potential energy is negligible.
Correct Answer: B — Kinetic energy of molecules
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Q. In the kinetic theory, the temperature of a gas is a measure of: (2022)
-
A.
The average potential energy of the molecules
-
B.
The average kinetic energy of the molecules
-
C.
The total energy of the gas
-
D.
The speed of the gas molecules
Solution
In the kinetic theory, the temperature of a gas is a measure of the average kinetic energy of the molecules.
Correct Answer: B — The average kinetic energy of the molecules
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