Nuclear Chemistry Test

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Nuclear Chemistry Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Electrons are emitted from _______ and the effect involves the change of _______.

In beta decay of an element.

A
K-shell, neutron to proton

B
Valence shell, proton to neutron

C
nucleus, neutron to proton

D
nucleus, electron to positron

Solution

In beta decay of an element, electrons are emitted from nucleus and the effect involves the change of neutron to proton
Question 2
1 / -0

The nuclide is likely to decay by. If it has n/p ration lying below and to the right of belt of stability.

A
Only positron emission

B
β-emission

C
α-emission

D
Either positron emission or electron capture

Solution

The nuclide is likely to decay by Either positron emission or electron capture.
Question 3
1 / -0

The element will undergo ______decay. If n/p ration of an element with atomic number greater than 83 falls in the zone of instability

A
β-decay

B
α-decay

C
β⁺-decay

D
no decay

Solution

n/p ration of an element with atomic number greater than 83 falls in the zone of instability. The element will undergo α-decay.
Question 4
1 / -0

Statement : 1 Nuclear forces are called short range forces.

Statement : 2 Nuclear forces operate over very small distance i.e., 10⁻¹⁵ m or 1 fermi.

A
Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanations of Statement-1.

B
Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

C
Statement-1 is true but Statement-2 is false.

D
Statement-1 is false but Statement-2 is true.

Solution

Reason is the correct explanation of Assertion.
Question 5
1 / -0

Why Gamma ray emission takes place during the radioactive decay?

A
Return of excited nucleus, left over by α-and β-emission, into the lower energy state

B
Fall of excited electron to the lower energy state

C
Too large n/p ratio

D
Too small n/p ratio

Solution

Gamma ray emission during radioactive decay is due to the Return of excited nucleus, left over by α-and β-emission, into the lower energy state.