1099+ Important Chemistry MCQ Questions Answers

Q:

Who was the first man to go to space?

A) Yuri Gagarin	B) Yuri Rontgen
C) Yuris Cui	D) Yuris Mahatinn

Answer & Explanation Answer: A) Yuri Gagarin

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Q:

Kidney stones are composed of ______.

A) Calcium Oxalate	B) Sodium Chloride
C) Magnesium Nitrate	D) Calcium Bicarbonate

Answer & Explanation Answer: A) Calcium Oxalate

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Q:

Methane an air pollutant is produced ______.

A) by action of ultraviolet light on nitrogenous compounds.	B) as a by-product of manufacturing ammoniacal fertilizers
C) by burning of coal in insufficient air	D) by digestion of food by animals

Answer & Explanation Answer: D) by digestion of food by animals

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Q:

The main mineral constituents of the continental mass are ________ and alumina.

A) iron oxide	B) silica
C) water	D) oxygen

Answer & Explanation Answer: B) silica

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Q:

Turquoise is an ore/mineral of

A) Copper	B) Manganese
C) Mercury	D) Tin

Answer & Explanation Answer: A) Copper

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Q:

When ice cubes are made, the entropy of water

A) does not change	B) decreases
C) increases	D) may either increase or decrease depending on the process used

Answer & Explanation Answer: B) decreases

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Q:

What is the natural source of Oxalic acid?

A) Tomato	B) Sour milk
C) Ant sting	D) Tamarind

Answer & Explanation Answer: A) Tomato

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Q:

Which of the following elements has the electronic configuration 2, 8, 3?

A) Magnesium	B) Sodium
C) Aluminium	D) Argon

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