1099+ Important Chemistry MCQ Questions Answers

Q:

Removal of carbon particles from air involves the principle of

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

Answer & Explanation Answer: C) Electrophoresis

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Q:

The conversion of hard water into soft water by boiling or adding calcium hydroxide is called _______.

A) Baker's process	B) Temp's process
C) Clarke's process	D) Lake's process

Answer & Explanation Answer: C) Clarke's process

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Q:

The process of depositing a layer of any desired metal on another material by means of electricity is called ___________.

A) Electroplating	B) Galvanisation
C) Rusting	D) Crystallisation

Answer & Explanation Answer: A) Electroplating

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Q:

The monomer/monomers used for the synthesis of Nylon 6 is/are

A) hexamethylenediamine and adipic acid	B) caprolactam
C) urea and formaldehydeD.	D) phenol and formaldehyde

Answer & Explanation Answer: A) hexamethylenediamine and adipic acid

Explanation:

Nylon is made when the appropriate monomers (the chemical building blocks which make up polymers) are combined to form a long chain via a condensation polymerisation reaction. The monomers for nylon 6-6 are adipic acid and hexamethylene diamine

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Q:

The most pure form of carbon among the options is

A) Anthracite	B) Lampblack
C) Graphite	D) Wood Charcoal

Answer & Explanation Answer: A) Anthracite

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Q:

....... is the property of attracting electrons by the halogen atoms in a molecule

A) Electron affinity	B) Electro positivity
C) Electro chemistry	D) Electro negativity

Answer & Explanation Answer: D) Electro negativity

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Q:

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

A) B2H6	B) Ne
C) C6H14	D) O3

Answer & Explanation Answer: D) O3

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Q:

Alpha particles are ___________.

A) twice the mass of beta particles	B) negatively charged
C) just like helium nuclei	D) lower in ionizing power as compared to gamma rays

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