The reaction is slowest when X is:

- N_{2}^{+}

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- I

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- O C H_{3}

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Solution

The correct option is C $- O C H_{3}$
The given reaction can be a $S_{N} 2$ reaction because it is a primary alkyl halide.
Rate of the reaction increase if it has a good leaving group.
Poor bases are good leaving group.
Since, $C H_{3} O^{-}$ is a strong base it is the poor leaving group among the given groups.
Other group are very good leaving groups.
Hence, option (c) is correct.

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Similar questions

For a complex reaction ......... .

(a) order of overall reaction is same as molecularity of the slowest step
(b) order of overall reaction is less than the molecularity of the slowest step
(c) order of overall reaction is greater than molecularity of the slowest step
(d) molecularity of the slowest step is never zero or non-integer

Q. Slowest reaction among the following under identical conditions is:

Slowest step of the multistep reaction is known as

In the Cannizzaro's reaction given below,

The slowest step is:

Q. Assertion :When chloral is heated with concentrated potassium hydroxides, it yields

C C l_{3} C O O^{-}

and

C C l_{3} C H_{2} O H

. Reason: In the cannizaro reaction, hydride transfer is the slowest step.

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