Q. Which element is commonly used in nuclear reactors as fuel? (2022)
-
A.
Uranium-235
-
B.
Carbon-12
-
C.
Hydrogen-1
-
D.
Oxygen-16
Solution
Uranium-235 is commonly used as fuel in nuclear reactors due to its ability to sustain a chain reaction.
Correct Answer: A — Uranium-235
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Q. Which element is found in Group 17 of the periodic table? (2022)
-
A.
Sodium
-
B.
Chlorine
-
C.
Calcium
-
D.
Magnesium
Solution
Chlorine is found in Group 17, also known as the halogens.
Correct Answer: B — Chlorine
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Q. Which element is known for its ability to form a stable +3 oxidation state? (2022)
-
A.
Boron
-
B.
Aluminium
-
C.
Gallium
-
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)
-
A.
Fluorine
-
B.
Francium
-
C.
Iron
-
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)
-
A.
Calcium
-
B.
Potassium
-
C.
Krypton
-
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 commonly used in the process of DNA cloning? (2022)
-
A.
DNA polymerase
-
B.
Restriction endonuclease
-
C.
Ligase
-
D.
Reverse transcriptase
Solution
Restriction endonucleases are used to cut DNA at specific sequences, which is essential for DNA cloning.
Correct Answer: B — Restriction endonuclease
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Q. Which enzyme is commonly used in the process of gene cloning? (2018)
-
A.
DNA polymerase
-
B.
Ligase
-
C.
Restriction endonuclease
-
D.
RNA polymerase
Solution
Restriction endonucleases are used to cut DNA at specific sequences, facilitating gene cloning.
Correct Answer: C — Restriction endonuclease
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Q. Which enzyme is involved in the Krebs cycle during respiration? (2022)
-
A.
ATP synthase
-
B.
Hexokinase
-
C.
Citrate synthase
-
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 protein digestion in the stomach? (2021)
-
A.
Amylase
-
B.
Pepsin
-
C.
Trypsin
-
D.
Lipase
Solution
Pepsin is the enzyme that digests proteins in the acidic environment of the stomach.
Correct Answer: B — Pepsin
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Q. Which enzyme is responsible for the digestion of carbohydrates in the mouth? (2021)
-
A.
Amylase
-
B.
Pepsin
-
C.
Lipase
-
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)
-
A.
DNA polymerase
-
B.
Helicase
-
C.
Ligase
-
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)
-
A.
Amylase
-
B.
Pepsin
-
C.
Trypsin
-
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)
-
A.
Amylase
-
B.
Pepsin
-
C.
Trypsin
-
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)
-
A.
Temperature
-
B.
Surface area of adsorbent
-
C.
Concentration of adsorbate
-
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)
-
A.
Gravitational force
-
B.
Electromagnetic force
-
C.
Weak nuclear force
-
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)
-
A.
Gravitational force
-
B.
Electromagnetic force
-
C.
Weak nuclear force
-
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 behaves most like an ideal gas under standard conditions? (2019)
-
A.
Helium
-
B.
Carbon dioxide
-
C.
Water vapor
-
D.
Ammonia
Solution
Helium behaves most like an ideal gas under standard conditions due to its low intermolecular forces and small size.
Correct Answer: A — Helium
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Q. Which gas behaves most like an ideal gas? (2020)
-
A.
Helium
-
B.
Carbon dioxide
-
C.
Water vapor
-
D.
Ammonia
Solution
Helium behaves most like an ideal gas because it is a monoatomic gas with weak intermolecular forces.
Correct Answer: A — Helium
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Q. Which gas is a byproduct of photosynthesis? (2023)
-
A.
Carbon dioxide
-
B.
Nitrogen
-
C.
Oxygen
-
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 drive to breathe in healthy individuals? (2023)
-
A.
Oxygen
-
B.
Carbon dioxide
-
C.
Nitrogen
-
D.
Hydrogen
Solution
Carbon dioxide levels in the blood primarily drive the urge to breathe; high levels stimulate the respiratory centers in the brain.
Correct Answer: B — Carbon dioxide
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Q. Which gas is primarily responsible for the regulation of breathing rate? (2022)
-
A.
Oxygen
-
B.
Carbon dioxide
-
C.
Nitrogen
-
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
-
A.
Oxygen
-
B.
Nitrogen
-
C.
Carbon Dioxide
-
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)
-
A.
Oxygen
-
B.
Nitrogen
-
C.
Carbon Dioxide
-
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
-
A.
Oxygen
-
B.
Hydrogen
-
C.
Nitrogen
-
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)
-
A.
Oxygen
-
B.
Carbon Dioxide
-
C.
Hydrogen
-
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 as a byproduct of photosynthesis? (2022)
-
A.
Carbon dioxide
-
B.
Oxygen
-
C.
Nitrogen
-
D.
Methane
Solution
Oxygen is released as a byproduct of photosynthesis during the light-dependent reactions.
Correct Answer: B — Oxygen
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Q. Which gas is released during the process of respiration in plants? (2022)
-
A.
Oxygen
-
B.
Carbon dioxide
-
C.
Nitrogen
-
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?
-
A.
Boyle's Law
-
B.
Charles's Law
-
C.
Gay-Lussac's Law
-
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)
-
A.
Oxygen (O2)
-
B.
Nitrogen (N2)
-
C.
Hydrogen (H2)
-
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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