Assertion -Rate of reaction of alkyl halide in Williamson-s synthesis reaction is 1- RX - 2-RX - 3-RX- Reason- It is a type of bimolecular substitution reaction SN2-

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Byju's Answer

Standard XII

Chemistry

Synthesis of Ethers

Assertion :Ra...

Question

Assertion :Rate of reaction of alkyl halide in Williamson's synthesis reaction is $1^{\circ} R X > 2^{\circ} R X > 3^{\circ} R X$ . Reason: It is a type of bimolecular substitution reaction $(S_{N} 2)$ .

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Williamson's synthesis occurs by $S_{N} 2$ mechanism and primary alkyl halides are most reactive in $S_{N} 2$ reactions.

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Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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Reason (R) A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in enrgy of reactant and product remains the same.

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Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(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.

ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

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Assertion :Rate of reaction of alkyl halide in Williamson's synthesis reaction is 1∘RX>2∘RX>3∘RX. Reason: It is a type of bimolecular substitution reaction (SN2).

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.Williamson's synthesis occurs by SN2 mechanism and primary alkyl halides are most reactive in SN2 reactions.

Assertion :Rate of reaction of alkyl halide in Williamson's synthesis reaction is $1^{\circ} R X > 2^{\circ} R X > 3^{\circ} R X$ . Reason: It is a type of bimolecular substitution reaction $(S_{N} 2)$ .

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Williamson's synthesis occurs by $S_{N} 2$ mechanism and primary alkyl halides are most reactive in $S_{N} 2$ reactions.