Q. Which carboxylic acid is known for its use in the production of nylon? (2019)
-
A.
Adipic acid
-
B.
Citric acid
-
C.
Lactic acid
-
D.
Acetic acid
Solution
Adipic acid is used in the production of nylon, particularly nylon 6,6.
Correct Answer:
A
— Adipic acid
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Q. Which carboxylic acid is responsible for the sour taste in citrus fruits? (2020)
-
A.
Citric acid
-
B.
Acetic acid
-
C.
Lactic acid
-
D.
Formic acid
Solution
Citric acid is responsible for the sour taste in citrus fruits.
Correct Answer:
A
— Citric acid
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Q. Which carboxylic acid is responsible for the sour taste in sour milk? (2020)
-
A.
Lactic acid
-
B.
Acetic acid
-
C.
Citric acid
-
D.
Formic acid
Solution
Lactic acid is produced during the fermentation of lactose in sour milk, giving it a sour taste.
Correct Answer:
A
— Lactic acid
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Q. Which carboxylic acid is used in the production of nylon? (2023)
-
A.
Hexanoic acid
-
B.
Adipic acid
-
C.
Citric acid
-
D.
Acetic acid
Solution
Adipic acid is used in the production of nylon, specifically nylon-6,6.
Correct Answer:
B
— Adipic acid
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Q. Which checkpoint in the cell cycle ensures that DNA is not damaged before replication? (2023)
-
A.
G1 checkpoint
-
B.
G2 checkpoint
-
C.
M checkpoint
-
D.
S checkpoint
Solution
The G1 checkpoint assesses the cell's size and DNA integrity before it enters the S phase for replication.
Correct Answer:
A
— G1 checkpoint
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Q. Which class of animals is characterized by having scales and laying eggs on land? (2022)
-
A.
Amphibia
-
B.
Reptilia
-
C.
Aves
-
D.
Mammalia
Solution
Reptiles are characterized by having scales and typically lay eggs on land.
Correct Answer:
B
— Reptilia
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Q. Which class of animals is characterized by the presence of scales? (2023)
-
A.
Amphibia
-
B.
Reptilia
-
C.
Aves
-
D.
Mammalia
Solution
Reptiles are characterized by the presence of scales, which help in protection and water retention.
Correct Answer:
B
— Reptilia
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Q. Which class of animals is known for having a three-chambered heart? (2023)
-
A.
Mammals
-
B.
Birds
-
C.
Reptiles
-
D.
Amphibians
Solution
Reptiles typically have a three-chambered heart, except for crocodilians which have a four-chambered heart.
Correct Answer:
C
— Reptiles
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Q. Which class of animals is known for having scales and laying eggs on land? (2022)
-
A.
Amphibia
-
B.
Reptilia
-
C.
Aves
-
D.
Mammalia
Solution
Reptiles (Reptilia) are known for having scales and typically lay eggs on land, adapting to terrestrial life.
Correct Answer:
B
— Reptilia
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Q. Which class of the phylum Chordata includes animals that are warm-blooded? (2023)
-
A.
Reptilia
-
B.
Amphibia
-
C.
Aves
-
D.
Osteichthyes
Solution
Class Aves (birds) are warm-blooded, maintaining a constant body temperature.
Correct Answer:
C
— Aves
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Q. Which class of the phylum Chordata is characterized by the presence of feathers? (2023)
-
A.
Mammalia
-
B.
Reptilia
-
C.
Aves
-
D.
Amphibia
Solution
Class Aves is characterized by the presence of feathers, which are unique to birds.
Correct Answer:
C
— Aves
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Q. Which component of blood is primarily responsible for the immune response? (2020)
-
A.
Plasma
-
B.
Red blood cells
-
C.
White blood cells
-
D.
Platelets
Solution
White blood cells, or leukocytes, are the key players in the immune response, helping to defend the body against infections.
Correct Answer:
C
— White blood cells
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Q. Which component of blood is responsible for the immune response? (2020)
-
A.
Plasma
-
B.
Red blood cells
-
C.
White blood cells
-
D.
Platelets
Solution
White blood cells (leukocytes) are responsible for the immune response, helping to fight infections and foreign substances.
Correct Answer:
C
— White blood cells
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Q. Which compound is a carboxylic acid? (2023)
-
A.
CH3COOH
-
B.
C2H5OH
-
C.
C3H6
-
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)
-
A.
Ethanol
-
B.
Acetone
-
C.
Formaldehyde
-
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)
-
A.
Ethylene
-
B.
Propylene
-
C.
Hexane
-
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
-
A.
Ethylene
-
B.
Propane
-
C.
Benzene
-
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 compound is primarily responsible for the sour taste of vinegar? (2019)
-
A.
Acetic acid
-
B.
Citric acid
-
C.
Lactic acid
-
D.
Formic acid
Solution
Acetic acid is the main component of vinegar, giving it its characteristic sour taste.
Correct Answer:
A
— Acetic acid
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Q. Which connective tissue is responsible for the transport of nutrients and gases? (2021)
-
A.
Adipose tissue
-
B.
Blood
-
C.
Bone
-
D.
Cartilage
Solution
Blood is a connective tissue that is responsible for the transport of nutrients, gases, and waste products throughout the body.
Correct Answer:
B
— Blood
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Q. Which connective tissue stores fat in the body? (2022)
-
A.
Adipose Tissue
-
B.
Cartilage
-
C.
Bone
-
D.
Blood
Solution
Adipose tissue stores fat in the body.
Correct Answer:
A
— Adipose Tissue
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Q. Which connective tissue type is responsible for the transport of nutrients and gases? (2021)
-
A.
Adipose tissue
-
B.
Blood
-
C.
Cartilage
-
D.
Bone
Solution
Blood is a connective tissue that transports nutrients, gases, and waste products throughout the body.
Correct Answer:
B
— Blood
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Q. Which contraceptive method is considered permanent? (2022)
-
A.
Condoms
-
B.
IUDs
-
C.
Tubal ligation
-
D.
Birth control pills
Solution
Tubal ligation is a surgical procedure that permanently prevents pregnancy by blocking the fallopian tubes.
Correct Answer:
C
— Tubal ligation
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Q. Which device is used to convert AC to DC? (2023)
-
A.
Transistor
-
B.
Diode
-
C.
Capacitor
-
D.
Inductor
Solution
A diode is used to convert alternating current (AC) to direct current (DC) by allowing current to flow in one direction.
Correct Answer:
B
— Diode
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Q. Which disease is caused by a deficiency of Vitamin C? (2022)
-
A.
Scurvy
-
B.
Rickets
-
C.
Beriberi
-
D.
Pellagra
Solution
Scurvy is caused by a deficiency of Vitamin C, leading to symptoms like bleeding gums and weakness.
Correct Answer:
A
— Scurvy
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Q. Which element has the atomic number 11? (2022)
-
A.
Sodium
-
B.
Magnesium
-
C.
Potassium
-
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?
-
A.
Helium
-
B.
Hydrogen
-
C.
Lithium
-
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)
-
A.
Oxygen
-
B.
Carbon
-
C.
Nitrogen
-
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)
-
A.
Calcium
-
B.
Potassium
-
C.
Argon
-
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
-
A.
Fluorine
-
B.
Oxygen
-
C.
Chlorine
-
D.
Nitrogen
Solution
Fluorine has the highest electronegativity.
Correct Answer:
A
— Fluorine
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Q. Which element has the lowest electronegativity? (2023)
-
A.
Francium
-
B.
Cesium
-
C.
Lithium
-
D.
Sodium
Solution
Francium has the lowest electronegativity among the given elements.
Correct Answer:
A
— Francium
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