Undergraduate
Q. Which element is known for its ability to form a stable +3 oxidation state? (2022)
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A.
Boron
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B.
Aluminium
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C.
Gallium
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D.
Indium
Solution
Aluminium commonly exhibits a stable +3 oxidation state in its compounds.
Correct Answer: B — Aluminium
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Q. Which element is represented by the symbol 'Fe'? (2019)
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A.
Fluorine
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B.
Francium
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C.
Iron
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D.
Fermium
Solution
The symbol 'Fe' stands for Iron, derived from its Latin name 'Ferrum'.
Correct Answer: C — Iron
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Q. Which element is represented by the symbol 'K'? (2022)
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A.
Calcium
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B.
Potassium
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C.
Krypton
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D.
Iron
Solution
The symbol 'K' represents Potassium, derived from its Latin name 'Kalium'.
Correct Answer: B — Potassium
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Q. Which enzyme is involved in the Krebs cycle during respiration? (2022)
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A.
ATP synthase
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B.
Hexokinase
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C.
Citrate synthase
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D.
Pyruvate kinase
Solution
Citrate synthase is an enzyme involved in the Krebs cycle, catalyzing the first step of the cycle.
Correct Answer: C — Citrate synthase
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Q. Which enzyme is responsible for the digestion of carbohydrates in the mouth? (2021)
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A.
Amylase
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B.
Pepsin
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C.
Lipase
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D.
Trypsin
Solution
Amylase is the enzyme that breaks down carbohydrates into simpler sugars in the mouth.
Correct Answer: A — Amylase
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Q. Which enzyme is responsible for unwinding the DNA double helix during replication? (2021)
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A.
DNA polymerase
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B.
Helicase
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C.
Ligase
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D.
Primase
Solution
Helicase is the enzyme that unwinds the DNA double helix during the process of replication.
Correct Answer: B — Helicase
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Q. Which enzyme is secreted by the pancreas to aid in protein digestion? (2023)
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A.
Amylase
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B.
Pepsin
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C.
Trypsin
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D.
Lipase
Solution
Trypsin is a pancreatic enzyme that helps in the digestion of proteins in the small intestine.
Correct Answer: C — Trypsin
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Q. Which enzyme is secreted by the pancreas to digest proteins? (2023)
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A.
Amylase
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B.
Pepsin
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C.
Trypsin
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D.
Lipase
Solution
Trypsin is a proteolytic enzyme secreted by the pancreas that digests proteins in the small intestine.
Correct Answer: C — Trypsin
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Q. Which factor does NOT affect the rate of adsorption? (2023)
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A.
Temperature
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B.
Surface area of adsorbent
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C.
Concentration of adsorbate
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D.
Color of adsorbent
Solution
The color of the adsorbent does not affect the rate of adsorption, while temperature, surface area, and concentration do.
Correct Answer: D — Color of adsorbent
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Q. Which force is primarily responsible for holding the nucleus together? (2022)
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A.
Gravitational force
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B.
Electromagnetic force
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C.
Weak nuclear force
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D.
Strong nuclear force
Solution
The strong nuclear force is responsible for holding the protons and neutrons together in the nucleus.
Correct Answer: D — Strong nuclear force
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Q. Which force is responsible for holding the nucleus together? (2019)
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A.
Gravitational force
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B.
Electromagnetic force
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C.
Weak nuclear force
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D.
Strong nuclear force
Solution
The strong nuclear force is responsible for holding the protons and neutrons together in the nucleus.
Correct Answer: D — Strong nuclear force
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Q. Which gas is a byproduct of photosynthesis? (2023)
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A.
Carbon dioxide
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B.
Nitrogen
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C.
Oxygen
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D.
Methane
Solution
Oxygen is released as a byproduct of photosynthesis during the light-dependent reactions.
Correct Answer: C — Oxygen
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Q. Which gas is evolved when an acid reacts with a carbonate? (2022)
Solution
When an acid reacts with a carbonate, carbon dioxide (CO2) gas is evolved.
Correct Answer: C — CO2
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Q. Which gas is primarily responsible for the regulation of breathing rate? (2022)
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A.
Oxygen
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B.
Carbon dioxide
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C.
Nitrogen
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D.
Hydrogen
Solution
Carbon dioxide levels in the blood are the primary factor that regulates the rate of breathing.
Correct Answer: B — Carbon dioxide
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Q. Which gas is produced during the electrolysis of water? (2020) 2020
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A.
Oxygen
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B.
Nitrogen
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C.
Carbon Dioxide
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D.
Hydrogen
Solution
During the electrolysis of water, oxygen is produced at the anode.
Correct Answer: A — Oxygen
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Q. Which gas is produced during the electrolysis of water? (2022)
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A.
Oxygen
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B.
Nitrogen
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C.
Carbon Dioxide
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D.
Hydrogen
Solution
During the electrolysis of water, oxygen is produced at the anode.
Correct Answer: A — Oxygen
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Q. Which gas is produced when an acid reacts with a metal? (2023) 2023
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A.
Oxygen
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B.
Hydrogen
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C.
Nitrogen
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D.
Carbon Dioxide
Solution
When an acid reacts with a metal, hydrogen gas is produced.
Correct Answer: B — Hydrogen
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Q. Which gas is produced when hydrochloric acid reacts with sodium bicarbonate? (2020)
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A.
Oxygen
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B.
Carbon Dioxide
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C.
Hydrogen
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D.
Nitrogen
Solution
The reaction between hydrochloric acid (HCl) and sodium bicarbonate (NaHCO3) produces carbon dioxide (CO2) as one of the products.
Correct Answer: B — Carbon Dioxide
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Q. Which gas is released during the process of respiration in plants? (2022)
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A.
Oxygen
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B.
Carbon dioxide
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C.
Nitrogen
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D.
Hydrogen
Solution
Carbon dioxide is released as a byproduct during the process of respiration in plants.
Correct Answer: B — Carbon dioxide
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Q. Which gas law relates pressure and temperature of a gas at constant volume?
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A.
Boyle's Law
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B.
Charles's Law
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C.
Gay-Lussac's Law
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D.
Avogadro's Law
Solution
Gay-Lussac's Law states that the pressure of a gas is directly proportional to its temperature at constant volume.
Correct Answer: C — Gay-Lussac's Law
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Q. Which gas would have the highest root mean square speed at the same temperature? (2019)
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A.
Oxygen (O2)
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B.
Nitrogen (N2)
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C.
Hydrogen (H2)
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D.
Carbon Dioxide (CO2)
Solution
Hydrogen (H2) has the lowest molar mass among the given gases, thus it has the highest root mean square speed at the same temperature.
Correct Answer: C — Hydrogen (H2)
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Q. Which gland is known as the 'master gland' of the endocrine system? (2021)
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A.
Thyroid
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B.
Pituitary
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C.
Adrenal
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D.
Pancreas
Solution
The pituitary gland is often referred to as the 'master gland' because it regulates the functions of other endocrine glands.
Correct Answer: B — Pituitary
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Q. Which group in the periodic table contains the noble gases? (2023)
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A.
Group 1
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B.
Group 2
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C.
Group 17
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D.
Group 18
Solution
Noble gases are found in Group 18 of the periodic table, characterized by their lack of reactivity due to having a full valence shell.
Correct Answer: D — Group 18
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Q. Which group of organisms is known for being autotrophic? (2023)
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A.
Animals
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B.
Fungi
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C.
Plants
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D.
Bacteria
Solution
Plants are known for being autotrophic as they can produce their own food through photosynthesis.
Correct Answer: C — Plants
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Q. Which group of organisms is known for their ability to live in extreme environments? (2023)
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A.
Eubacteria
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B.
Archaebacteria
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C.
Fungi
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D.
Protozoa
Solution
Archaebacteria are known for their ability to thrive in extreme environments.
Correct Answer: B — Archaebacteria
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Q. Which group of plants is known for having vascular tissues? (2019)
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A.
Bryophytes
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B.
Pteridophytes
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C.
Algae
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D.
Mosses
Solution
Pteridophytes are the first group of plants to develop vascular tissues, which help in the transport of water and nutrients.
Correct Answer: B — Pteridophytes
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Q. Which haloalkane has the highest boiling point?
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A.
CH3Cl
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B.
C2H5Br
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C.
C3H7Cl
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D.
C4H9I
Solution
C4H9I has the highest boiling point due to the larger molecular size and stronger van der Waals forces.
Correct Answer: D — C4H9I
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Q. Which haloalkane is most likely to undergo elimination reactions? (2023)
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A.
1-bromopropane
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B.
2-bromobutane
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C.
3-bromobutane
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D.
Bromobenzene
Solution
3-bromobutane is more likely to undergo elimination reactions due to the presence of a tertiary carbon.
Correct Answer: C — 3-bromobutane
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Q. Which hormone is involved in the process of fruit ripening? (2020)
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A.
Gibberellins
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B.
Auxins
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C.
Ethylene
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D.
Cytokinins
Solution
Ethylene is the hormone that plays a key role in the ripening of fruits.
Correct Answer: C — Ethylene
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Q. Which hormone is involved in the regulation of apical dominance? (2019)
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A.
Auxins
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B.
Cytokinins
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C.
Gibberellins
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D.
Ethylene
Solution
Auxins play a crucial role in maintaining apical dominance by inhibiting the growth of lateral buds.
Correct Answer: A — Auxins
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