1.

Assertion: Neopenty alcohol on treatment with HCl gives neopentyl chloride. Reason: Neopentyl is a tertiary alcohol.

Answer»

If both ASSERTION and reason are true, and reason is the true explanation of the assertion.
If both assertion and reason are true, but reason is not the true explanation o the assertion.
if assertion is true, but reason is false.
If both assertion and reason are false.

Solution :Correct assertion. Neopentyl alcohol on treatment with HCL gives 2-chloro-2-methylbutane and not neopentyl chloride.
Correct reason. This reaction occurs via rearrangement of initially formed less stable `1^(@)` carbocation to the more stable `3^(@)` carbocations.
`CH_(3)-UNDERSET(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CH_(2)OH underset(-H_(2)O)overset(HCl)to CH_(3)-underset(Cl)underset(|)overset(CH_(3))overset(|)(C)-CH_(2)CH_(3)`.


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