Assertion :An example of K-capture is 13356Ba+e−→13355Cs+X−ray Reason: The atomic number decreases by one unit as a result of K-capture.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
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B
Both Assertion and Reason are correct, but Reason is not the correct explanation for Assertion.
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C
Assertion is correct, but Reason is incorrect.
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D
Both Assertion and Reason are incorrect.
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Solution
The correct option is B Both Assertion and Reason are correct, but Reason is not the correct explanation for Assertion. Both Assertion and Reason are correct, but Reason is not the correct explanation for Assertion as the reason behind K-capture is not decrease to atomic number by one unit.
The correct reason is the capture of e− in nucleus from the K-shell of the atom.