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Question

Assertion: K-shell electron capture is detected by analyzing the wavelength of X-ray emitted.
Reason: The wavelength of the X-ray is characteristic of the daughter element and not the parent element.

A
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
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B
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
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C
Assertion is true but Reason is false
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D
Assertion is false but Reason is true
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E
Both Assertion and Reason are false
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Solution

The correct option is B Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
The nucleus of one of the atoms captures an electron from K-shell which converts proton to neutron. It is common in nuclei having Z>10
56Ba133+1e055Cs133+Xray
K-shell electron capture is detected by analyzing the wavelength of X-ray emitted.
The wavelength of the X-ray is characteristic of the daughter element and not the parent element.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

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