1.

Assertion: In a beta-decay, the neutron number decreases by one. Reason: In beta-decay atomic number increases by one.

Answer»

if both the assertion and the REASON are true and the reason is the CORRECT explanation of the assertion
If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion
Assertion is true, but the reason is false
Assertion is also, but the reason is true

Solution :In B-decay there is no CHANGE in the mass number of the daughter nucleus but the atomic number increases by ONE.


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