Government CDS Question:
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The rusting of iron nail—
(A) decreases its weight
(B) increases its weight
(C) does not affect weight but iron is oxidized
(D) does not affect weight but iron is reduced

Government CDS Interview Question
Government CDS Interview Question

Answer:

(B) increases its weight

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Which one of the following when dissolved in H2O gives hissing sound?
(A) Limestone
(B) Slacked lime
(C) Soda lime
(D) Quicklime		Which one of the following is heavy water used in nuclear reactor?
(A) Water having molecular weight 18 amu
(B) Water having molecular weight 20 amu
(C) Water at 4°C but having molecular weight 19 amu
(D) Water below the ice in a frozen sea