1099+ Important Chemistry MCQ Questions Answers

Q:

Metals react with sodium hydroxide to produce ___________.

A) oxygen gas	B) sodium
C) water	D) hydrogen gas

Answer & Explanation Answer: D) hydrogen gas

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Q:

Which of the following is used as anaesthetics?

A) N2	B) N2O
C) CH4	D) CO2

Answer & Explanation Answer: B) N2O

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Q:

Trinitrotoluene is

A) used to melt metals	B) used to fuse two metals
C) used as an abrasive	D) used as an explosive

Answer & Explanation Answer: D) used as an explosive

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Q:

Name the gas used in preparation of bleaching powder

A) Oxygen	B) Hydrogen
C) Nitrogen	D) Chlorine

Answer & Explanation Answer: D) Chlorine

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Q:

Which among the following is white phosphorus?

A) P1	B) P6
C) P4	D) P5

Answer & Explanation Answer: C) P4

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Q:

Pyrolusite is an ore/mineral of ___________.

A) Mercury	B) Manganese
C) Molybdenum	D) Lead

Answer & Explanation Answer: B) Manganese

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Q:

Which of the following elements has the lowest melting point?

A) Zinc	B) Titanium
C) Sulphur	D) Fluorine

Answer & Explanation Answer: D) Fluorine

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Q:

Which gas is released when water is added to bleaching powder?

A) Oxygen	B) Hydrogen
C) Carbon dioxide	D) Chlorine

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