Q. Which of the following processes is characterized by constant pressure?
A.
Isothermal
B.
Isochoric
C.
Isobaric
D.
Adiabatic
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Solution
An isobaric process is characterized by constant pressure.
Correct Answer: C — Isobaric
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Q. Which of the following processes is directly influenced by auxins? (2021)
A.
Phototropism
B.
Photosynthesis
C.
Respiration
D.
Transpiration
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Solution
Auxins are responsible for phototropism, the growth of plants towards light.
Correct Answer: A — Phototropism
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Q. Which of the following processes is endothermic and results in an increase in entropy?
A.
Dissolving salt in water
B.
Combustion of methane
C.
Condensation of steam
D.
Freezing of water
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Solution
Dissolving salt in water is an endothermic process that increases the disorder of the system, thus increasing entropy.
Correct Answer: A — Dissolving salt in water
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Q. Which of the following processes is endothermic?
A.
Combustion of fuels
B.
Dissolving ammonium nitrate in water
C.
Respiration
D.
Condensation of steam
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Solution
Dissolving ammonium nitrate in water absorbs heat, making it an endothermic process.
Correct Answer: B — Dissolving ammonium nitrate in water
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Q. Which of the following processes is exothermic?
A.
Melting of ice
B.
Dissolving ammonium nitrate in water
C.
Combustion of methane
D.
Evaporation of water
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Solution
The combustion of methane is an exothermic process, releasing heat.
Correct Answer: C — Combustion of methane
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Q. Which of the following processes is expected to have the largest increase in entropy?
A.
Dissolving salt in water
B.
Melting ice
C.
Boiling water
D.
Sublimation of solid iodine
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Solution
Sublimation of solid iodine to gas involves a phase change from solid to gas, which has a significant increase in disorder, thus the largest increase in entropy.
Correct Answer: D — Sublimation of solid iodine
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Q. Which of the following processes is expected to have the largest positive change in entropy?
A.
Dissolving salt in water
B.
Condensing steam
C.
Melting ice
D.
Combining hydrogen and oxygen gases
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Solution
Dissolving salt in water increases the number of particles in solution, leading to a significant increase in entropy.
Correct Answer: A — Dissolving salt in water
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Q. Which of the following processes is influenced by auxins? (2021)
A.
Phototropism
B.
Gravitropism
C.
Apical dominance
D.
All of the above
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Solution
Auxins influence various processes including phototropism, gravitropism, and apical dominance.
Correct Answer: D — All of the above
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Q. Which of the following processes is irreversible and leads to an increase in entropy?
A.
Reversible isothermal expansion
B.
Free expansion of gas
C.
Isothermal compression
D.
Adiabatic expansion
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Solution
Free expansion of gas is an irreversible process that leads to an increase in entropy as the gas expands into a vacuum.
Correct Answer: B — Free expansion of gas
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Q. Which of the following processes is irreversible? (2022)
A.
Isothermal expansion
B.
Adiabatic expansion
C.
Free expansion
D.
Isobaric process
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Solution
Free expansion is an irreversible process as it occurs without any external pressure acting on the gas.
Correct Answer: C — Free expansion
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Q. Which of the following processes is isochoric? (2023)
A.
Constant volume
B.
Constant pressure
C.
Constant temperature
D.
Adiabatic
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Solution
An isochoric process is one that occurs at constant volume.
Correct Answer: A — Constant volume
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Q. Which of the following processes is isothermal for an ideal gas?
A.
Heating at constant volume
B.
Cooling at constant pressure
C.
Expansion against a constant external pressure
D.
Expansion where temperature remains constant
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Solution
An isothermal process for an ideal gas is characterized by the condition that the temperature remains constant during the expansion or compression.
Correct Answer: D — Expansion where temperature remains constant
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Q. Which of the following processes is isothermal?
A.
Heating a gas in a closed container
B.
Compressing a gas without heat exchange
C.
Allowing a gas to expand slowly while maintaining constant temperature
D.
Cooling a gas in a closed container
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Solution
Allowing a gas to expand slowly while maintaining constant temperature is an isothermal process.
Correct Answer: C — Allowing a gas to expand slowly while maintaining constant temperature
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Q. Which of the following processes is not a thermodynamic process?
A.
Isothermal
B.
Adiabatic
C.
Isochoric
D.
Static
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Solution
A static process does not involve any change in state variables, hence it is not considered a thermodynamic process.
Correct Answer: D — Static
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Q. Which of the following processes is NOT directly influenced by auxins? (2021)
A.
Phototropism
B.
Gravitropism
C.
Apical dominance
D.
Photosynthesis
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Solution
Photosynthesis is not directly influenced by auxins; they mainly affect growth and development processes.
Correct Answer: D — Photosynthesis
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Q. Which of the following processes is not governed by the First Law of Thermodynamics?
A.
Isothermal expansion
B.
Adiabatic compression
C.
Isochoric heating
D.
None of the above
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Solution
All the listed processes are governed by the First Law of Thermodynamics, so the answer is 'None of the above'.
Correct Answer: D — None of the above
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Q. Which of the following processes is NOT influenced by auxins? (2021)
A.
Phototropism
B.
Gravitropism
C.
Apical dominance
D.
Fruit ripening
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Solution
Fruit ripening is primarily influenced by ethylene, not auxins.
Correct Answer: D — Fruit ripening
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Q. Which of the following processes is NOT influenced by plant hormones? (2021)
A.
Seed germination
B.
Fruit ripening
C.
Photosynthesis
D.
Flowering
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Solution
Photosynthesis is a biochemical process that is not directly influenced by plant hormones.
Correct Answer: C — Photosynthesis
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Q. Which of the following processes is primarily regulated by auxins? (2021)
A.
Phototropism
B.
Photosynthesis
C.
Respiration
D.
Transpiration
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Solution
Auxins are primarily responsible for phototropism, the growth of plants towards light.
Correct Answer: A — Phototropism
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Q. Which of the following processes is spontaneous at constant temperature and pressure?
A.
Decreasing entropy
B.
Increasing entropy
C.
Constant entropy
D.
None of the above
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Solution
A spontaneous process at constant temperature and pressure is characterized by an increase in entropy.
Correct Answer: B — Increasing entropy
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Q. Which of the following processes is used to produce synthetic rubber?
A.
Polymerization
B.
Condensation
C.
Hydrogenation
D.
Saponification
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Solution
Synthetic rubber is produced through polymerization of monomers such as butadiene and styrene.
Correct Answer: A — Polymerization
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Q. Which of the following processes occurs during aerobic respiration in plants? (2020)
A.
Fermentation
B.
Glycolysis
C.
Anaerobic respiration
D.
Photosynthesis
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Solution
Glycolysis is the first step in aerobic respiration, where glucose is broken down to produce energy.
Correct Answer: B — Glycolysis
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Q. Which of the following processes occurs during expiration? (2023)
A.
Diaphragm contracts
B.
Intercostal muscles relax
C.
Lungs expand
D.
Air is drawn in
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Solution
During expiration, the diaphragm relaxes and the intercostal muscles also relax, leading to a decrease in thoracic volume and expulsion of air from the lungs.
Correct Answer: B — Intercostal muscles relax
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Q. Which of the following processes occurs during the light-dependent reactions of photosynthesis? (2020)
A.
Calvin cycle
B.
Photolysis of water
C.
Carbon fixation
D.
Synthesis of glucose
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Solution
Photolysis of water occurs during the light-dependent reactions, producing oxygen and electrons.
Correct Answer: B — Photolysis of water
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Q. Which of the following processes occurs in the chloroplasts? (2019)
A.
Glycolysis
B.
Krebs cycle
C.
Photosynthesis
D.
Fermentation
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Solution
Photosynthesis occurs in chloroplasts, where light energy is converted into chemical energy in the form of glucose.
Correct Answer: C — Photosynthesis
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Q. Which of the following processes occurs in the nucleus of a cell? (2023)
A.
Photosynthesis
B.
Cell respiration
C.
DNA replication
D.
Protein synthesis
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Solution
DNA replication occurs in the nucleus, where the cell's genetic material is housed.
Correct Answer: C — DNA replication
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Q. Which of the following processes occurs in the thylakoid membranes of chloroplasts? (2020)
A.
Calvin cycle
B.
Light-dependent reactions
C.
Light-independent reactions
D.
Photorespiration
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Solution
The light-dependent reactions of photosynthesis occur in the thylakoid membranes.
Correct Answer: B — Light-dependent reactions
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Q. Which of the following processes occurs in the thylakoid membranes? (2020)
A.
Calvin cycle
B.
Light-dependent reactions
C.
Light-independent reactions
D.
Photorespiration
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Solution
The light-dependent reactions of photosynthesis occur in the thylakoid membranes.
Correct Answer: B — Light-dependent reactions
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Q. Which of the following processes results in an increase in entropy?
A.
Isothermal compression
B.
Adiabatic expansion
C.
Isobaric heating
D.
All of the above
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Solution
Isobaric heating increases the temperature and volume of the gas, leading to an increase in entropy.
Correct Answer: C — Isobaric heating
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Q. Which of the following programming languages was developed first? (1957)
A.
Fortran
B.
COBOL
C.
LISP
D.
C
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Solution
Fortran, developed in the 1950s, was one of the earliest high-level programming languages, predating COBOL, LISP, and C.
Correct Answer: A — Fortran
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