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Question

When ethyl chloride is added to Sodium tert-butoxide, ethyl tert-butyl ether is obtained as the major product (shown below):

When the concentration of ethyl chloride is doubled, the reaction rate:


A

quadruples

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B

halves

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C

remains unchanged

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D


doubles

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Solution

The correct option is D


doubles


Clearly, the reaction is an SN2 – a bimolecular reaction. Since no further data is given, let us assume an order of 2, so the rate expression is:

Reaction rate=[(CH3)3O]×[C2H5Cl]

Clearly, the rate would double if concentration of ethyl chloride is doubled.


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