1.

Assertion: ""_2X^(A) undergoes 2 alpha-decay and the daughter product is ""_(z-4)Y^(A-8) Reason: Inalpha-decay the mass number decreases by 4 and atomic number decreases by 2.

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
If Assertion is true, but the reason is false.
If Assertion is false, but the reason is true.

Solution :Explanation: `""_(Z)X^(A) to ""_(Z-2)Y^(A-4)+ ""_(2)He^(4)(alpha "decay")`


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