Undergraduate
Q. Which law states that energy cannot be created or destroyed, only transformed? (2021)
A.
Zeroth Law
B.
First Law
C.
Second Law
D.
Third Law
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Solution
The First Law of Thermodynamics states that energy cannot be created or destroyed, only transformed.
Correct Answer: B — First Law
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Q. Which law states that for every action, there is an equal and opposite reaction? (2022)
A.
Newton's First Law
B.
Newton's Second Law
C.
Newton's Third Law
D.
Law of Conservation of Momentum
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Solution
Newton's Third Law states that for every action, there is an equal and opposite reaction.
Correct Answer: C — Newton's Third Law
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Q. Which law states that the current through a conductor between two points is directly proportional to the voltage across the two points? (2021)
A.
Ohm's Law
B.
Kirchhoff's Law
C.
Faraday's Law
D.
Ampere's Law
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Solution
Ohm's Law states that the current (I) through a conductor is directly proportional to the voltage (V) across it, given by the formula V = IR.
Correct Answer: A — Ohm's Law
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Q. Which law states that the entropy of an isolated system always increases? (2021)
A.
Zeroth law of thermodynamics
B.
First law of thermodynamics
C.
Second law of thermodynamics
D.
Third law of thermodynamics
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Solution
The second law of thermodynamics states that the entropy of an isolated system will always increase over time.
Correct Answer: C — Second law of thermodynamics
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Q. Which law states that the entropy of an isolated system never decreases? (2021)
A.
Zeroth law of thermodynamics
B.
First law of thermodynamics
C.
Second law of thermodynamics
D.
Third law of thermodynamics
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Solution
The second law of thermodynamics states that the entropy of an isolated system never decreases over time.
Correct Answer: C — Second law of thermodynamics
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Q. Which law states that the heat absorbed or released by a substance is proportional to the change in temperature? (2021)
A.
Boyle's Law
B.
Charles's Law
C.
Newton's Law of Cooling
D.
Calorimetry
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Solution
Calorimetry states that the heat absorbed or released by a substance is proportional to the change in temperature.
Correct Answer: D — Calorimetry
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Q. Which law states that the induced electromotive force (emf) in a closed loop is equal to the negative rate of change of magnetic flux through the loop? (2022)
A.
Faraday's Law
B.
Lenz's Law
C.
Ohm's Law
D.
Ampere's Law
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Solution
Faraday's Law states that the induced emf in a closed loop is equal to the negative rate of change of magnetic flux through the loop.
Correct Answer: A — Faraday's Law
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Q. Which law states that the induced electromotive force is proportional to the rate of change of magnetic flux? (2022)
A.
Faraday's Law
B.
Lenz's Law
C.
Ohm's Law
D.
Ampere's Law
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Solution
Faraday's Law of electromagnetic induction states that the induced electromotive force in any closed circuit is equal to the rate of change of magnetic flux through the circuit.
Correct Answer: A — Faraday's Law
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Q. Which law states that the induced EMF in a closed loop is equal to the negative rate of change of magnetic flux through the loop? (2022)
A.
Faraday's Law
B.
Lenz's Law
C.
Ohm's Law
D.
Ampere's Law
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Solution
Faraday's Law states that the induced EMF in a closed loop is equal to the negative rate of change of magnetic flux through the loop.
Correct Answer: A — Faraday's Law
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Q. Which law states that the total momentum of a closed system remains constant?
A.
Newton's First Law
B.
Newton's Second Law
C.
Conservation of Momentum
D.
Conservation of Energy
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Solution
The Conservation of Momentum states that in a closed system, the total momentum remains constant if no external forces act on it.
Correct Answer: C — Conservation of Momentum
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Q. Which macromolecule is primarily responsible for genetic information? (2020)
A.
Proteins
B.
Lipids
C.
Carbohydrates
D.
Nucleic Acids
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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 macromolecule is primarily responsible for storing genetic information? (2020)
A.
Proteins
B.
Carbohydrates
C.
Lipids
D.
Nucleic acids
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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 mineral is primarily involved in the formation of chlorophyll? (2019)
A.
Magnesium
B.
Calcium
C.
Phosphorus
D.
Sulfur
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Solution
Magnesium is a central component of the chlorophyll molecule, essential for photosynthesis.
Correct Answer: A — Magnesium
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Q. Which mineral is primarily involved in the synthesis of chlorophyll? (2019)
A.
Magnesium
B.
Calcium
C.
Phosphorus
D.
Iron
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Solution
Magnesium is a central component of the chlorophyll molecule, which is essential for photosynthesis.
Correct Answer: A — Magnesium
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Q. Which molecule has the highest electronegativity difference? (2021)
A.
HCl
B.
NaCl
C.
CO
D.
H2
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Solution
NaCl has the highest electronegativity difference between sodium and chlorine, leading to a strong ionic bond.
Correct Answer: B — NaCl
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Q. Which muscle is primarily responsible for the extension of the leg at the knee? (2022)
A.
Quadriceps femoris
B.
Hamstrings
C.
Gastrocnemius
D.
Sartorius
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Solution
The quadriceps femoris muscle is responsible for extending the leg at the knee joint.
Correct Answer: A — Quadriceps femoris
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Q. Which muscle type is involuntary and found in the walls of internal organs? (2023)
A.
Skeletal muscle
B.
Cardiac muscle
C.
Smooth muscle
D.
Striated muscle
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Solution
Smooth muscle is involuntary and is found in the walls of internal organs, facilitating movements such as peristalsis.
Correct Answer: C — Smooth muscle
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Q. Which nutrient is crucial for energy transfer in plants? (2020)
A.
Phosphorus
B.
Iron
C.
Zinc
D.
Copper
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Solution
Phosphorus is vital for energy transfer as it is a component of ATP, the energy currency of the cell.
Correct Answer: A — Phosphorus
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Q. Which nutrient is essential for the synthesis of amino acids? (2019)
A.
Sulfur
B.
Iron
C.
Zinc
D.
Copper
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Solution
Sulfur is essential for the synthesis of amino acids, particularly cysteine and methionine.
Correct Answer: A — Sulfur
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Q. Which nutrient is primarily absorbed in the stomach? (2020)
A.
Proteins
B.
Fats
C.
Carbohydrates
D.
Water and alcohol
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Solution
The stomach primarily absorbs water and alcohol, while other nutrients are absorbed in the small intestine.
Correct Answer: D — Water and alcohol
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Q. Which nutrient is primarily responsible for root development? (2019)
A.
Nitrogen
B.
Phosphorus
C.
Potassium
D.
Magnesium
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Solution
Phosphorus is essential for root development and is involved in energy transfer and storage.
Correct Answer: B — Phosphorus
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Q. Which of the following acids is a dicarboxylic acid?
A.
Oxalic acid
B.
Acetic acid
C.
Formic acid
D.
Propanoic acid
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Solution
Oxalic acid is a dicarboxylic acid with two carboxyl groups.
Correct Answer: A — Oxalic acid
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Q. Which of the following acids is a saturated carboxylic acid?
A.
Butanoic acid
B.
Hexenoic acid
C.
Cyclopropanoic acid
D.
Benzoic acid
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Solution
Butanoic acid is a saturated carboxylic acid.
Correct Answer: A — Butanoic acid
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Q. Which of the following acids is used in the production of esters?
A.
Acetic acid
B.
Sulfuric acid
C.
Nitric acid
D.
Hydrochloric acid
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Solution
Acetic acid is commonly used in the production of esters.
Correct Answer: A — Acetic acid
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Q. Which of the following alcohols is most soluble in water? (2022)
A.
1-butanol
B.
2-butanol
C.
3-butanol
D.
Cyclohexanol
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Solution
2-butanol has a higher solubility in water due to its ability to form hydrogen bonds more effectively than the others.
Correct Answer: B — 2-butanol
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Q. Which of the following alkali metals is most reactive with water? (2023)
A.
Lithium
B.
Sodium
C.
Potassium
D.
Rubidium
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Solution
Potassium (K) is more reactive with water than Sodium (Na) and Lithium (Li).
Correct Answer: C — Potassium
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Q. Which of the following alkaline earth metals is most reactive? (2020)
A.
Beryllium
B.
Calcium
C.
Strontium
D.
Barium
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Solution
Barium is the most reactive alkaline earth metal due to its larger atomic size and lower ionization energy.
Correct Answer: D — Barium
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Q. Which of the following amines is the most basic? (2023) 2023
A.
Methylamine
B.
Aniline
C.
Ethylamine
D.
Dimethylamine
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Solution
Dimethylamine is the most basic due to the electron-donating effect of the two methyl groups, which increases the availability of the lone pair on nitrogen.
Correct Answer: D — Dimethylamine
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Q. Which of the following animals belongs to the class Insecta? (2022)
A.
Spider
B.
Scorpion
C.
Butterfly
D.
Crab
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Solution
Butterflies are insects and belong to the class Insecta, characterized by having three pairs of legs and usually two pairs of wings.
Correct Answer: C — Butterfly
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Q. Which of the following animals is an example of a cnidarian? (2019)
A.
Earthworm
B.
Jellyfish
C.
Starfish
D.
Lobster
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Solution
Jellyfish are examples of cnidarians, which are known for their stinging cells called cnidocytes.
Correct Answer: B — Jellyfish
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