GENERAL SCIENCE GENERAL QUESTIONS

1.

Brass gets discoloured in air because of the presence of which of the following gases in air?
A.     Oxygen
B.     Hydrogen sulphide
C.     Carbon dioxide
D.     Nitrogen
Answer & Explanation

Answer: Option B

Explanation:

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2.

Which of the following is a non metal that remains liquid at room temperature?
A.     Phosphorous    B.     Bromine
C.     Chlorine    D.     Helium
Answer & Explanation

Answer: Option B

Explanation:

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3.

Chlorophyll is a naturally occurring chelate compound in which central metal is
A.     copper    B.     magnesium
C.     iron    D.     calcium
Answer & Explanation

Answer: Option B

Explanation:

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4.

Which of the following is used in pencils?
A.     Graphite    B.     Silicon
C.     Charcoal    D.     Phosphorous
Answer & Explanation

Answer: Option A

Explanation:

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5.

Which of the following metals forms an amalgam with other metals?
A.     Tin    B.     Mercury
C.     Lead    D.     Zinc
Answer & Explanation

Answer: Option B

Explanation:

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