1099+ Important Chemistry MCQ Questions Answers

Q:

What is the value of triple point (solid, liquid and gas) of Water?

A) 273.16° C	B) -273.16 K
C) 273.16 K	D) 0° C

Answer & Explanation Answer: C) 273.16 K

Explanation:

The temperature at which a substance can exist in equilibrium in the liquid, solid, and gaseous states. The triple point of pure water is at 0.01°C (273.16K, 32.01°F).

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Q:

Which of the following acts as best adsorbent?

A) Charcoal	B) Activated Charcoal
C) Activated Coconut Charcoal	D) Carbon black

Answer & Explanation Answer: C) Activated Coconut Charcoal

Explanation:

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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

Answer & Explanation Answer: C) Aluminium

Explanation:

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Q:

________ is used for making vinegar.

A) Tartaric acid	B) Malic acid
C) Oxalic acid	D) Acetic acid

Answer & Explanation Answer: D) Acetic acid

Explanation:

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Q:

______ is used for making chemical apparatus like beakers, flasks etc.

A) Potash glass	B) Hard glass
C) Jena glass	D) Soda glass

Answer & Explanation Answer: B) Hard glass

Explanation:

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Q:

Which of the following induces souring of milk?

A) Acetic Acid	B) Citric Acid
C) Ascorbic Acid	D) Lactic Acid

Answer & Explanation Answer: D) Lactic Acid

Explanation:

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Q:

The Chemical formula of Ammonium sulphate is

A) NH4SO4	B) (NH4)2SO3
C) NH4SO3	D) (NH4)2SO4

Answer & Explanation Answer: D) (NH4)2SO4

Explanation:

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Q:

How many atoms are present in a $(NH$ ₄)2SO4 molecule?

A) 15	B) 14
C) 13	D) 12

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