1099+ Important Chemistry MCQ Questions Answers

Q:

Natural radioactivity was discovered by

A) Rutherford	B) Becquerel
C) Curie	D) Schmidt

Answer & Explanation Answer: B) Becquerel

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Q:

The fundamental particles present in equal numbers in neutral atoms are

A) protons and electrons	B) neutrons and electrons
C) protons and neutrons	D) protons and positrons

Answer & Explanation Answer: A) protons and electrons

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Q:

The discovery of neutron became very late because

A) it is present in nucleus	B) it is a fundamental particle
C) it does not move	D) it does not carry any charge

Answer & Explanation Answer: D) it does not carry any charge

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Q:

Neutron was discovered by

A) J.J.Thomson	B) Chadwick
C) Rrutherford	D) Priestley

Answer & Explanation Answer: B) Chadwick

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Q:

Cathode rays have

A) mass only	B) charge only
C) no mass and no charge	D) mass and charge both

Answer & Explanation Answer: D) mass and charge both

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Q:

Cathode rays are

A) electromagnetic wave	B) stream of alpha particle
C) stream of electrons	D) radiations

Answer & Explanation Answer: C) stream of electrons

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Q:

An alloy is

A) a compound	B) an allotropic form
C) an isomer	D) a mixture

Answer & Explanation Answer: D) a mixture

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Q:

The most abundant metal in earth crust is

A) Iron	B) magnesium
C) calcium	D) aluminium

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