Arrange these compounds in order of increasing SN1 reaction rate

Question

Arrange these compounds in order of increasing SN1 reaction rate (A)  IV<II<III<I  (B)  I<II<III<IV  (C)  IV<I<III<II  (D)  IV<I<II<III

Tardigrade Admin · Accepted Answer

SN1 reaction is favoured for 3° alkyl halide. For a given system BE of C-Cl>C-Br, I with phenyl group gives resonance stabilized carbocation. Thus, increasing order is IV<II<III< text I

Q. Arrange these compounds in order of increasing $S_{N} 1$ reaction rate

$I V < II < III < I$

$I < II < III < I V$

$I V < I < III < II$

$I V < I < II < III$

$S_{N}^{1}$ reaction is favoured for $3^{\circ}$ alkyl halide. For a given system BE of $C - Cl > C - B r,$ I with phenyl group gives resonance stabilized carbocation. Thus, increasing order is $I V < II < III < I$

Q. Arrange these compounds in order of increasing SN​1 reaction rate

IV<II<III<I

I<II<III<IV

IV<I<III<II

IV<I<II<III