1099+ Important Chemistry MCQ Questions Answers

Q:

_____ is the major component of natural gas.

A) Acetone	B) Methane
C) Chlorine	D) Hexane

Answer & Explanation Answer: B) Methane

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Q:

The common name of dichlorodifluoromethane is _____.

A) galena	B) Freon
C) gypsum	D) borax

Answer & Explanation Answer: B) Freon

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Q:

Anions are formed by _____.

A) losing of electrons	B) gaining of electrons
C) gaining of neutrons	D) losing of neutrons

Answer & Explanation Answer: B) gaining of electrons

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Q:

Which one of the following nonmetals shows allotropy in the liquid state?

A) Carbon	B) Sulphur
C) Phosphorous	D) Bromine

Answer & Explanation Answer: B) Sulphur

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Q:

Who invented the modern periodic table?

A) Faraday	B) Mendeleev
C) Newton	D) Bohr

Answer & Explanation Answer: B) Mendeleev

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Q:

Magnesium oxide (MgO) + Water (H2O) = ?

A) [Mg(OH)]	B) [Mg(O2H)2]
C) [Mg2(OH)]	D) [Mg(OH)2]

Answer & Explanation Answer: D) [Mg(OH)2]

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Q:

Acids that contain Hydrogen and other non-metallic element(s), except Oxygen, are called

A) Hydracids	B) Dilute acids
C) Strong acids	D) Weak acids

Answer & Explanation Answer: A) Hydracids

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Q:

Find the odd one out.

A) NaCl	B) Na2CO3
C) H2O	D) He

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