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General Science - Questions and Answers

Practice questions on General Science.

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221. The green colour of water in a lake is due to
A. pollution
B. excessive growth of seaweeds
C. algae
D. None of these
Explanation:
222. Which of the following effects of current does not depend on its direction ? 1. Heating effect 2. Chemical effect 3. Magnetic effect
A. 1 only
B. 1 and 2
C. 1 and 3
D. 1, 2 and 3
Explanation:
223. Electrolytes are
A. acids and bases only
B. acids and salts only
C. bases and salts only
D. acids, bases and salts
Explanation:
224. Which of the following is a non-ferrous metal ?
A. Aluminium
B. Iron
C. Nickel
D. Cobalt
Explanation:
225. The most suitable flux for the removal of a basic impurity like lime is
A. Magnesium oxide
B. Iron oxide
C. Sand
D. Carbon black
Explanation:
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