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

Answer 1

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 $Z>10$
${}_{56}B{a}^{133}{+}_{-1}{e}^0{\to }_{55}C{s}^{133}+X-ray$
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.