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Question

A nuclide X undergoes α-decay and another nuclide undergoes β-decay. Which of the following statements are correct?

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

The correct options are
A The β-particles emitted by Y may have widely different speed
D The α-particles emitted by X will have almost the same speed
The β-particles emitted by Y may vary due to massless β particles.
The α-particles have momentum conservation affecting them strongly so their speed variation is very little.
Thus option A and C is correct

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