1099+ Important Chemistry MCQ Questions Answers

Q:

Which one of the following is an insulator?

A) copper	B) wood
C) mercury	D) aluminium

Answer & Explanation Answer: B) wood

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Q:

Rusting is _____.

A) Electrolysis	B) Oxidation
C) Redox reaction (Oxidation and Reduction)	D) Reduction

Answer & Explanation Answer: C) Redox reaction (Oxidation and Reduction)

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Q:

Chemical Formula of Water is _____ .

A) O2H	B) OH
C) HO	D) H2O

Answer & Explanation Answer: D) H2O

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Q:

Which among the following is not an example of emulsion?

A) Chocolate-Milk	B) Butter
C) Whipped Cream	D) Curd

Answer & Explanation Answer: D) Curd

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Q:

Which of the following elements has the lowest melting point?

A) Oxygen	B) Gold
C) Silver	D) Manganese

Answer & Explanation Answer: A) Oxygen

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Q:

______ decreases the rate of setting of cement.

A) Alumina	B) Silica
C) Gypsum	D) Magnesium oxide

Answer & Explanation Answer: C) Gypsum

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Q:

Soft drinks contain:

A) Oxalic acid	B) Tartaric acid
C) Carbonic acid	D) Citric acid

Answer & Explanation Answer: C) Carbonic acid

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Q:

Removal of carbon particles from air involves the principle of

A) Precipitation	B) Filteration
C) Electrophoresis	D) Sedimentation

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