Q. In an AC circuit, what is the relationship between the average power and the RMS voltage? (2023)
-
A.
P = V_rms²/R
-
B.
P = V_peak²/R
-
C.
P = V_rms/R
-
D.
P = V_peak/R
Solution
The average power (P) in an AC circuit is given by P = V_rms²/R, where R is the resistance.
Correct Answer: A — P = V_rms²/R
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Q. In an ecosystem, which of the following organisms is known as a primary producer? (2021)
-
A.
Herbivores
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B.
Carnivores
-
C.
Decomposers
-
D.
Plants
Solution
Plants are primary producers as they convert sunlight into chemical energy through photosynthesis.
Correct Answer: D — Plants
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Q. In an electrochemical cell, the anode is where: (2019)
-
A.
Oxidation occurs
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B.
Reduction occurs
-
C.
Electrons are gained
-
D.
Ions are produced
Solution
In an electrochemical cell, oxidation occurs at the anode.
Correct Answer: A — Oxidation occurs
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Q. In an RLC circuit, what does the term 'resonance' refer to? (2019)
-
A.
Maximum current at a specific frequency
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B.
Minimum current at any frequency
-
C.
Constant voltage
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D.
Zero inductance
Solution
Resonance in an RLC circuit occurs when the inductive reactance equals the capacitive reactance, resulting in maximum current at a specific frequency.
Correct Answer: A — Maximum current at a specific frequency
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Q. In an RLC circuit, what happens to the impedance at resonance? (2023)
-
A.
Minimum
-
B.
Maximum
-
C.
Zero
-
D.
Infinite
Solution
At resonance, the impedance in an RLC circuit is at a minimum.
Correct Answer: A — Minimum
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Q. In an RLC series circuit, what happens to the impedance at resonance? (2020)
-
A.
It is minimum
-
B.
It is maximum
-
C.
It is zero
-
D.
It is equal to resistance
Solution
At resonance in an RLC series circuit, the impedance is equal to the resistance.
Correct Answer: D — It is equal to resistance
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Q. In ecological succession, what is the term for the first species to colonize a barren environment? (2022)
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A.
Pioneer species
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B.
Climax community
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C.
Keystone species
-
D.
Invasive species
Solution
Pioneer species are the first organisms to colonize previously uninhabited or disturbed environments.
Correct Answer: A — Pioneer species
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Q. In electrolysis, the process of oxidation occurs at which electrode? (2019)
-
A.
Anode
-
B.
Cathode
-
C.
Both electrodes
-
D.
None of the above
Solution
In electrolysis, oxidation occurs at the anode.
Correct Answer: A — Anode
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Q. In flowering plants, the male gamete is produced in which part? (2021)
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A.
Ovary
-
B.
Anther
-
C.
Stigma
-
D.
Style
Solution
The male gamete is produced in the anther, which is part of the stamen in flowering plants.
Correct Answer: B — Anther
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Q. In flowering plants, the ovary develops into which part after fertilization? (2023)
-
A.
Seed
-
B.
Fruit
-
C.
Flower
-
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 ovary develops into which structure after fertilization? (2023)
-
A.
Seed
-
B.
Fruit
-
C.
Flower
-
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 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
-
C.
Viscous flow
-
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)
-
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 Mendel's experiments, which trait was observed to be dominant in pea plants? (2018)
-
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)
-
A.
Nuclear mass
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B.
Binding energy
-
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)
-
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 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)
-
A.
Atoms with the same number of protons but different neutrons
-
B.
Atoms with different numbers of protons
-
C.
Atoms with the same mass number
-
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
-
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)
-
A.
The process of adsorption
-
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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