Undergraduate
Q. Which carboxylic acid is found in citrus fruits? (2023)
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A.
Acetic acid
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B.
Citric acid
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C.
Lactic acid
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D.
Formic acid
Solution
Citric acid is the carboxylic acid found in citrus fruits, contributing to their sour taste.
Correct Answer: B — Citric 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 carboxylic acid is known for its role in the Krebs cycle? (2019)
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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
Citric acid plays a crucial role in the Krebs cycle, which is a key metabolic pathway.
Correct Answer: A — Citric acid
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Q. Which carboxylic acid is known for its use in the production of biodiesel? (2023)
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A.
Palmitic acid
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B.
Stearic acid
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C.
Oleic acid
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D.
Linoleic acid
Solution
Oleic acid is commonly used in the production of biodiesel due to its favorable properties.
Correct Answer: C — Oleic acid
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Q. Which carboxylic acid is known for its use in the production of nylon? (2019)
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A.
Adipic acid
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B.
Citric acid
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C.
Lactic acid
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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)
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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
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)
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A.
Lactic acid
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B.
Acetic acid
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C.
Citric acid
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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)
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A.
Hexanoic acid
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B.
Adipic acid
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C.
Citric acid
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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)
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A.
G1 checkpoint
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B.
G2 checkpoint
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C.
M checkpoint
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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 known for having a three-chambered heart? (2023)
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A.
Mammals
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B.
Birds
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C.
Reptiles
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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 the phylum Chordata includes animals that are warm-blooded? (2023)
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A.
Reptilia
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B.
Amphibia
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C.
Aves
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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)
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A.
Mammalia
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B.
Reptilia
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C.
Aves
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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)
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A.
Plasma
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B.
Red blood cells
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C.
White blood cells
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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 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 connective tissue is responsible for the transport of nutrients and gases? (2021)
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A.
Adipose tissue
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B.
Blood
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C.
Bone
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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 type is responsible for the transport of nutrients and gases? (2021)
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A.
Adipose tissue
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B.
Blood
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C.
Cartilage
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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)
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A.
Condoms
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B.
IUDs
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C.
Tubal ligation
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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)
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A.
Transistor
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B.
Diode
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C.
Capacitor
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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)
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A.
Scurvy
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B.
Rickets
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C.
Beriberi
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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)
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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 commonly used in nuclear reactors as fuel? (2022)
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A.
Uranium-235
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B.
Carbon-12
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C.
Hydrogen-1
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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)
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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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