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Question

A nuclide A undergoes α decay and another nuclide B undergoes β decay

A
All the α - particles emitted by A will have almost the same speed
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B
The α -particles emitted by A may have widely different speeds
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C
All the β -particles emitted by B will have almost the same speed
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D
The β -particles emitted b B may have widely different speeds
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Solution

The correct options are
A All the α - particles emitted by A will have almost the same speed
D The β -particles emitted b B may have widely different speeds
In α decay, the entire energy is carried away by the alpha particle as its kinetic energy.
In β1 decay, the energy is shared between the β-particle and anti-neutrino. Hence, the speed of β particle will vary depending on the energy of the anti-neutrino.

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