general science general questions

61.

Which of the following metals remain in liquid for under normal conditions?
A.     Radium    B.     Zinc
C.     Uranium    D.     Mercury
Answer & Explanation

Answer: Option D

Explanation:

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62.

Potassium Permanganate is used for purifying drinking water, because
A.     it is a sterilising agent
B.     it dissolves the impurities of water
C.     it is a reducing agent
D.     it is an oxidising agent
Answer & Explanation

Answer: Option D

Explanation:

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63.

Which of the following is an element?
A.     Ruby    B.     Sapphire
C.     Emerald    D.     Diamond
Answer & Explanation

Answer: Option D

Explanation:

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