1099+ Important Chemistry MCQ Questions Answers

Q:

The salt concentration (measured as salinity in parts per thousand), is greater than _______ % in hypersaline lagoons.

A) 50	B) 100
C) 150	D) 200

Answer & Explanation Answer: B) 100

Explanation:

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Q:

Which of the following is a chemical formula of quicklime?

A) Ca2O	B) Ca2CO3
C) CaO2	D) CaO

Answer & Explanation Answer: D) CaO

Explanation:

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Q:

Rust is formed from iron and

A) Carbon	B) Oxygen
C) Hydrogen	D) All of the above

Answer & Explanation Answer: B) Oxygen

Explanation:

Rust is formed from iron and oxygen.

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Q:

Which of the following is a Synthetic rubber?

A) Leoprene	B) Monoprene
C) Neoprene	D) Isoprene

Answer & Explanation Answer: C) Neoprene

Explanation:

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Q:

In which of the following ${MgCl}_{2}$ is soluble?

A) Petrol	B) Acetone
C) Kerosene	D) Water

Answer & Explanation Answer: D) Water

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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

Explanation:

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Q:

Which of the following elements is used for vulcanizing rubber?

A) Sulphur	B) Chlorine
C) Bromine	D) Phosphorus

Answer & Explanation Answer: A) Sulphur

Explanation:

Vulcanization of rubber is a process of improvement of the rubber elasticity and strength by heating it in the presence of sulfur rubber much stronger, more flexible, and more resistant to heat and other environmental conditions.

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Q:

pH of the human blood is ______.

A) Slightly Acidic	B) Highly Acidic
C) Slightly Basic	D) Highly Basic

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