Basic MCQs about Atom & Nucleus.

Basic mcqs about atom and nucleus

Questions with Answers

1. Which unit we use to express Nuclear sizes ?

A Tesla

B Newton

C Fermi

D None of above

Answer And Explanation

Answer: Option C

2. The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called

A Nuclear fusion

B Nuclear fission

C Nuclear reaction

D Fast breeding

Answer And Explanation

Answer: Option B

3. Atom is the smallest part of matter which takes part in chemical reactions.

A True

B False

Answer And Explanation

Answer: Option A

4. Which of following in not a property of cathode ray.

A Cathode rays are invisible and travel in a straight line.

B These rays can ionise gases.

C These rays can penetrate through thin metal foils.

D These rays make materials cool on which they fall.

Answer And Explanation

Answer: Option D

Explanation:

These rays heat the materials on which they fall.

5. Radiocarbon is produced in the atmosphere as a result of

A collision between fast neutrons and nitrogen nuclei present in the atmosphere

B action of ultraviolet light from the sun on atmospheric oxygen

C action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere

D lightning discharge in atmosphere

Answer And Explanation

Answer: Option A


6. Who discovered Atom ?

A Madam Curie

B James Chadwick

C Rutherford

D John Dalton

Answer And Explanation

Answer: Option D

Explanation:

John Dalton discovered Atom in 1808,

7. Who discovered Radium?

A. Madam Curie

B. James Chadwick

C. Rutherford

D. John Dalton

Answer and Explanation

Answer A

Explanation

Madam Curie discovered Radium in 1898,

8.Who discovered Neutron?

A. Madam Curie

B. James Chadwick

C. Rutherford

D. John Dalton

Answer and Explanation

Answer B

Explanation

James Chadwick discovered Neutron in 1932