Q35 / 160 · AP EAMCET 2022 (07 Jul Shift 2) · Chemistry

The rate of reaction of $t$-butyl bromide and . $\mathrm{NaOH}$ in water depends on the concentration of

  • A
    both $t$-butyl bromide and $\mathrm{NaOH}$
  • B
    $\mathrm{NaOH}$
  • C
    independent of concentration
  • Correct answer
    D
    $t$-butyl bromide

Solution

Hydrolysis of $t$-butyl bromide with aqueous $\mathrm{NaOH}$ is an example of $\mathrm{S}_{\mathrm{N}} 1$ reaction. The formation of carbocation is the slow step and therefore rate determining step. The rate of the reaction depends only on concentration of tertiary butyl bromide. . Step I. Formation of carbocation Figure
Step 2. Attack of nucleophile on carbocationFigure

Hence, the correct answer is option: 'D'.

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