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)
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A.
Faraday's Law
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B.
Lenz's Law
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C.
Ohm's Law
-
D.
Ampere's Law
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 pressure of a gas is directly proportional to its temperature at constant volume? (2019)
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A.
Boyle's Law
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B.
Charles's Law
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C.
Gay-Lussac's Law
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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 law states that the rate of heat transfer through a material is proportional to the temperature difference? (2022)
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A.
Newton's Law of Cooling
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B.
Fourier's Law
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C.
Stefan-Boltzmann Law
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D.
Boyle's Law
Solution
Fourier's Law states that the rate of heat transfer through a material is proportional to the temperature difference across it.
Correct Answer: B — Fourier's Law
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Q. Which law states that the total momentum of a closed system remains constant?
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A.
Newton's First Law
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B.
Newton's Second Law
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C.
Conservation of Momentum
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D.
Conservation of Energy
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)
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A.
Proteins
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B.
Lipids
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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 macromolecule is primarily responsible for storing genetic information? (2020)
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A.
Proteins
-
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 microbe is primarily responsible for the fermentation of vinegar? (2021)
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A.
Yeast
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B.
Lactic acid bacteria
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C.
Acetic acid bacteria
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D.
Molds
Solution
Acetic acid bacteria are responsible for the fermentation process that converts alcohol into vinegar.
Correct Answer: C — Acetic acid bacteria
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Q. Which microbe is primarily responsible for the production of vinegar? (2020)
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A.
Yeast
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B.
Lactic acid bacteria
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C.
Acetic acid bacteria
-
D.
Molds
Solution
Acetic acid bacteria are responsible for the fermentation process that produces vinegar.
Correct Answer: C — Acetic acid bacteria
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Q. Which microbe is primarily responsible for the production of yogurt? (2018)
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A.
Lactobacillus
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B.
Escherichia coli
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C.
Staphylococcus
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D.
Bacillus subtilis
Solution
Lactobacillus is the primary bacterium used in the fermentation of milk to produce yogurt.
Correct Answer: A — Lactobacillus
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Q. Which microbe is primarily responsible for the spoilage of food? (2019)
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A.
Bacteria
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B.
Fungi
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C.
Viruses
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D.
Both bacteria and fungi
Solution
Both bacteria and fungi can cause food spoilage through their metabolic activities.
Correct Answer: D — Both bacteria and fungi
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Q. Which mineral is primarily involved in the formation of chlorophyll? (2019)
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A.
Magnesium
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B.
Calcium
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C.
Phosphorus
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D.
Sulfur
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)
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A.
Magnesium
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B.
Calcium
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C.
Phosphorus
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D.
Iron
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)
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A.
HCl
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B.
NaCl
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C.
CO
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D.
H2
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)
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A.
Quadriceps femoris
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B.
Hamstrings
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C.
Gastrocnemius
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D.
Sartorius
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 is primarily responsible for the flexion of the forearm at the elbow? (2023)
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A.
Biceps Brachii
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B.
Brachialis
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C.
Triceps Brachii
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D.
Brachioradialis
Solution
The biceps brachii is primarily responsible for flexing the forearm at the elbow joint.
Correct Answer: A — Biceps Brachii
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Q. Which muscle type is involuntary and found in the walls of internal organs? (2023)
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A.
Skeletal muscle
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B.
Cardiac muscle
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C.
Smooth muscle
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D.
Striated muscle
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 muscle type is striated and under voluntary control? (2022)
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A.
Smooth muscle
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B.
Cardiac muscle
-
C.
Skeletal muscle
-
D.
All muscle types
Solution
Skeletal muscle is striated and under voluntary control, allowing for conscious movement.
Correct Answer: C — Skeletal muscle
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Q. Which nutrient is crucial for energy transfer in plants? (2020)
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A.
Phosphorus
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B.
Iron
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C.
Zinc
-
D.
Copper
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 formation of nucleic acids? (2020)
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A.
Potassium
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B.
Phosphorus
-
C.
Calcium
-
D.
Iron
Solution
Phosphorus is essential for the formation of nucleic acids (DNA and RNA), which are vital for genetic information and protein synthesis.
Correct Answer: B — Phosphorus
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Q. Which nutrient is essential for the synthesis of amino acids? (2019)
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A.
Sulfur
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B.
Iron
-
C.
Zinc
-
D.
Copper
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)
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A.
Proteins
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B.
Fats
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C.
Carbohydrates
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D.
Water and alcohol
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)
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A.
Nitrogen
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B.
Phosphorus
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C.
Potassium
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D.
Magnesium
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?
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A.
Oxalic acid
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B.
Acetic acid
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C.
Formic acid
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D.
Propanoic acid
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
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B.
Hexenoic acid
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C.
Cyclopropanoic acid
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D.
Benzoic acid
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?
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A.
Acetic acid
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B.
Sulfuric acid
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C.
Nitric acid
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D.
Hydrochloric acid
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)
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A.
1-butanol
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B.
2-butanol
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C.
3-butanol
-
D.
Cyclohexanol
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)
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A.
Lithium
-
B.
Sodium
-
C.
Potassium
-
D.
Rubidium
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 has the highest melting point? (2019)
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A.
Beryllium
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B.
Magnesium
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C.
Calcium
-
D.
Strontium
Solution
Beryllium has the highest melting point among the alkaline earth metals.
Correct Answer: A — Beryllium
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Q. Which of the following alkaline earth metals is most reactive? (2020)
-
A.
Beryllium
-
B.
Calcium
-
C.
Strontium
-
D.
Barium
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 alkaline earth metals is the least reactive? (2022)
-
A.
Barium
-
B.
Calcium
-
C.
Magnesium
-
D.
Strontium
Solution
Magnesium (Mg) is the least reactive among the alkaline earth metals due to its higher ionization energy compared to the others.
Correct Answer: C — Magnesium
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