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Subjects
Science State Board
Class 10
Nuclear physics
Textbook questions

14. Assertion and reason type questions

Exercise condition:

8 m.

1.

Assertion (A):	A neutron impinging on $U-235$ , splits it to produce Barium and Krypton.
Reason (R):	$U - 235$ is a fissile material.

Both A and R are true but R is not the correct explanation of A
A is true but R is false
Both A and R are true and R is the correct explanation of A
A is false but R is true

2.

Assertion (A):	In a $β$ - decay, the neutron number decreases by one.
Reason (R):	In $β$ - decay atomic number increases by one.

Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A
A is false but R is true
A is true but R is false

3.

Assertion (A):	Extreme temperature is necessary to execute nuclear fusion.
Reason (R):	In a nuclear fusion, the nuclei of the reactants combine releasing high energy.

A is false but R is true
A is true but R is false
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A

4.

Assertion (A):	Control rods are known as 'neutron seeking rods'.
Reason (R):	Control rods are used to perform sustained nuclear fission reaction.

A is true but R is false
Both A and R are true but R is not the correct explanation of A
Both A and R are true and R is the correct explanation of A
A is false but R is true

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