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This section contains Assertion and Reas...

This section contains Assertion and Reason type questions. Each question has 4 choice (1), (2), (3) and (4), out of which only one is correct.
Assertion (A) `_ZX^A` undergoes `2alpha`-decays, `2beta`-decays and `2gamma`-decays and the daughter product is`z-2gamma^(A-8)`
Reason (R ) In `alpha`-decay, the mass number decreases by 4 and atomic number decreases by 2. In `beta`-decay, the mass number remains unchanged but atomic number increases by 1 only.

A

Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion

B

Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion

C

Assertion is correct but Reason is incorrect

D

Assertion is incorrect but Reason is correct

Text Solution

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The correct Answer is:
A
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This section contains assertion and reason type questions. Each question has 4 choice (1), (2),(3), and (4), out of which only one is correct. Assertion (A) IUPAC name of neopentane is 2,2 – dimethylpropane. Reason ( R) Neopentane has one quaternary and four primary carbon atoms.

Staements I: ._zX^4 undergoes 2 alpha -decays, 2 beta -decays (negative beta ) and 2 gamma -decays. As a result, the daughter product is ._z-2X^(A-B) . Staements II: In beta -decay, the mass number decreases by 4 unit and atomic number decreases by 2 unit. In beta -decay (negative beta ), the mass number remains unchanged and atomic number increases by 1 unit. In gamma -decay, mass number and atomic number remain unchanged.