25.
The main use of salt in the diet is to
A. make the taste of food better
B. produce in small amounts the hydrochloric acid required for the digestion of food
C. ease the process of cooking
D. increase the solubility of food particles in water
Answer & Explanation
Answer: Option B
Explanation:
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26.
The monomer of polythene is
A. vinyl chloride
B. ethylene
C. ethyl alcohol
D. None of the above
Answer & Explanation
Answer: Option B
Explanation:
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27.
The luster of a metal is due to
A. its high density
B. its high polishing
C. its chemical inertness
D. presence of free electrons
Answer & Explanation
Answer: Option D
Explanation:
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28.
The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
A. 1.568 x 103
B. 6.023 x 1019
C. 4.84 x 1017
D. 6.023 x 1023
Answer & Explanation
Answer: Option B
Explanation:
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29.
The most malleable metal is
A. platinum B. silver
C. iron D. gold
Answer & Explanation
Answer: Option D
Explanation:
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30.
The oil used in the froth floatation process is
A. coconut oil
B. olive oil
C. kerosene oil
D. pine oil
Answer & Explanation
Answer: Option D
Explanation:
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