1099+ Important Chemistry MCQ Questions Answers

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:

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:

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 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:

The common name of sodium tetraborate decahydrate is _____.

A) epsom salt	B) gypsum
C) Borax	D) galena

Answer & Explanation Answer: C) Borax

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Q:

Which molecule contains a polar covalent bond?

A) NBr3	B) C2H4
C) ZnS	D) AgL

Answer & Explanation Answer: A) NBr3

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Q:

Which was not produced by volcanic outgassing?

A) Carbon dioxide	B) Water vapor
C) Sulfur	D) Oxygen

Answer & Explanation Answer: D) Oxygen

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Q:

Pyrolusite is an ore/mineral of ___________.

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

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