1099+ Important Chemistry MCQ Questions Answers

Q:

Benzene is ______ in ethyl alcohol.

A) soluble	B) solute
C) insoluble	D) insolate

Answer & Explanation Answer: C) insoluble

Explanation:

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Q:

The only non-metal which is liquid at room temperature is

A) Mercury	B) Bromine
C) Chlorine	D) Gallium

Answer & Explanation Answer: B) Bromine

Explanation:

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Q:

A) Mineral	B) Tribe
C) Grass	D) Town

Answer & Explanation Answer: C) Grass

Explanation:

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Q:

Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?

A) BBr3	B) NH3
C) CH2N2	D) CCl2F2

Answer & Explanation Answer: D) CCl2F2

Explanation:

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Q:

............. elements have the largest atoms

A) F	B) O
C) H	D) Li

Answer & Explanation Answer: D) Li

Explanation:

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Q:

Find the odd one out.

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

Answer & Explanation Answer: D) He

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Q:

The gases used in different types of welding would include

A) Acetylene	B) Oxygen
C) Oxygen and Acetylene	D) Nitrogen, Oxygen and Acetylene

Answer & Explanation Answer: C) Oxygen and Acetylene

Explanation:

Oxygen and Acetylene are the gases used in different types of welding.

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Q:

Trinitrotoluene is

A) used to melt metals	B) used to fuse two metals
C) used as an abrasive	D) used as an explosive

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