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Q:

Formation of cation occurs by

A) gain of electron B) loss of electron
C) gain of proton D) loss of proton
 
Answer & Explanation Answer: B) loss of electron

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Q:

A particle which is four times in mass and two times in charge that of proton is

A) helium atom B) an alpha particle
C) deuteron D) tritium
 
Answer & Explanation Answer: B) an alpha particle

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Q:

A Radioactive subatance emits

A) alpha particles B) beta particle
C) gamma particle D) all of the three
 
Answer & Explanation Answer: D) all of the three

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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:

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:

The most abundant metal in earth crust is

A) Iron B) magnesium
C) calcium D) aluminium
 
Answer & Explanation Answer: D) aluminium

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Q:

The credit for the discovery of transuranic element goes to

A) Hahn B) Rutherford
C) Seaborg D) Curie
 
Answer & Explanation Answer: C) Seaborg

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