Chemistry
Q. Which biomolecule is known for its role in catalyzing biochemical reactions?
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A.
Nucleic Acids
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B.
Carbohydrates
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C.
Proteins
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D.
Lipids
Solution
Proteins, specifically enzymes, are known for their role in catalyzing biochemical reactions.
Correct Answer: C — Proteins
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Q. Which biomolecule is primarily involved in the structure of cell membranes?
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A.
Proteins
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B.
Carbohydrates
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C.
Nucleic Acids
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D.
Phospholipids
Solution
Phospholipids are the main components of cell membranes, forming a bilayer.
Correct Answer: D — Phospholipids
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Q. Which biomolecule is primarily responsible for genetic information? (2023)
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A.
Carbohydrates
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B.
Proteins
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C.
Lipids
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D.
Nucleic acids
Solution
Nucleic acids, such as DNA and RNA, store and transmit genetic information.
Correct Answer: D — Nucleic acids
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Q. Which biomolecule is primarily responsible for storing genetic information? (2023) 2023
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A.
Proteins
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B.
Carbohydrates
-
C.
Lipids
-
D.
Nucleic acids
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer: D — Nucleic acids
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Q. Which biomolecule is primarily used for energy storage in animals?
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A.
Glycogen
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B.
Cellulose
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C.
Chitin
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D.
Starch
Solution
Glycogen is the primary energy storage molecule in animals.
Correct Answer: A — Glycogen
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Q. Which biomolecule is responsible for storing genetic information? (2023)
-
A.
Proteins
-
B.
Lipids
-
C.
Carbohydrates
-
D.
Nucleic acids
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer: D — Nucleic acids
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Q. Which biomolecule is responsible for storing genetic information? (2023) 2023
-
A.
Proteins
-
B.
Lipids
-
C.
Carbohydrates
-
D.
Nucleic acids
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer: D — Nucleic acids
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Q. Which carboxylic acid has the highest boiling point?
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A.
Formic acid
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B.
Acetic acid
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C.
Propanoic acid
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D.
Butanoic acid
Solution
Butanoic acid has the highest boiling point due to its longer carbon chain.
Correct Answer: D — Butanoic acid
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Q. Which carboxylic acid is commonly known as 'butyric acid'?
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A.
C3H6O2
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B.
C4H8O2
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C.
C5H10O2
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D.
C2H4O2
Solution
Butyric acid has the molecular formula C4H8O2.
Correct Answer: B — C4H8O2
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Q. Which carboxylic acid is commonly known as formic acid?
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A.
Methanoic acid
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B.
Ethanoic acid
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C.
Propanoic acid
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D.
Butanoic acid
Solution
Formic acid is the common name for Methanoic acid.
Correct Answer: A — Methanoic acid
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Q. Which carboxylic acid is commonly known as vinegar?
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A.
Formic acid
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B.
Acetic acid
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C.
Citric acid
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D.
Lactic acid
Solution
Acetic acid is commonly known as vinegar.
Correct Answer: B — Acetic acid
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Q. Which carboxylic acid is found in vinegar?
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A.
Citric acid
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B.
Acetic acid
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C.
Lactic acid
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D.
Formic acid
Solution
Acetic acid is the main component found in vinegar.
Correct Answer: B — Acetic acid
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Q. Which compound is a carboxylic acid? (2023)
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A.
CH3COOH
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B.
C2H5OH
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C.
C3H6
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D.
C4H10
Solution
CH3COOH (acetic acid) is a carboxylic acid, containing the -COOH functional group.
Correct Answer: A — CH3COOH
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Q. Which compound is a ketone? (2023)
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A.
Ethanol
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B.
Acetone
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C.
Formaldehyde
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D.
Acetic acid
Solution
Acetone is a ketone, which contains a carbonyl group (C=O) bonded to two carbon atoms.
Correct Answer: B — Acetone
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Q. Which compound is a saturated hydrocarbon? (2023)
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A.
Ethylene
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B.
Propylene
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C.
Hexane
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D.
Benzene
Solution
Hexane is a saturated hydrocarbon, containing only single bonds between carbon atoms.
Correct Answer: C — Hexane
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Q. Which compound is a saturated hydrocarbon? (2023) 2023
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A.
Ethylene
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B.
Propane
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C.
Benzene
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D.
Butyne
Solution
Propane is a saturated hydrocarbon, containing only single bonds between carbon atoms.
Correct Answer: B — Propane
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Q. Which element has the atomic number 11? (2022)
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A.
Sodium
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B.
Magnesium
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C.
Potassium
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D.
Calcium
Solution
Sodium has the atomic number 11, indicating it has 11 protons.
Correct Answer: A — Sodium
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Q. Which element has the atomic number 1?
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A.
Helium
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B.
Hydrogen
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C.
Lithium
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D.
Beryllium
Solution
Hydrogen has the atomic number 1.
Correct Answer: B — Hydrogen
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Q. Which element has the atomic number 6? (2021)
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A.
Oxygen
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B.
Carbon
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C.
Nitrogen
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D.
Hydrogen
Solution
The element with atomic number 6 is Carbon (C).
Correct Answer: B — Carbon
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Q. Which element has the highest atomic number in the first 20 elements? (2020)
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A.
Calcium
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B.
Potassium
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C.
Argon
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D.
Chlorine
Solution
Calcium has the highest atomic number (20) among the first 20 elements.
Correct Answer: A — Calcium
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Q. Which element has the highest electronegativity? (2023) 2023
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A.
Fluorine
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B.
Oxygen
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C.
Chlorine
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D.
Nitrogen
Solution
Fluorine has the highest electronegativity.
Correct Answer: A — Fluorine
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Q. Which element has the lowest electronegativity? (2023)
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A.
Francium
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B.
Cesium
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C.
Lithium
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D.
Sodium
Solution
Francium has the lowest electronegativity among the given elements.
Correct Answer: A — Francium
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Q. Which element is found in Group 17 of the periodic table? (2022)
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A.
Sodium
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B.
Chlorine
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C.
Calcium
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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)
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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 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 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
-
A.
Oxygen
-
B.
Hydrogen
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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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