Assertion :2-butyne on treatment with $N a N H_{2}$ followed by acidifictaion yields 1-butyne. Reason: Alkynes isomerizes on treatment with a strong base.

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

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

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
2 - butyne on treatment with sodamide followed by acidification yields 1- butyne because alkynes isomerize on treatment with a strong base.
Terminal alkyne isomer forms sodium salt with soda amide and is phased out of isomerization equilibrium which is why 1-butyne is the only product instead of an equilibrium mixture of two products.
Hence, Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion (A) Phenol forms 2, 4, 6-tribromophenol on treatment with $B r_{2}$ in carbon disulphide at 273K.
Reason (R) Bromine polarises in carbon disulphide.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.