The acidic hydrolysis of ether (X) shown below is fastest when.

Options

A. One phenyl group is replaced by a methyl group
B. One phenyl group is replaced by a para-methoxyphenyl group
C. Two phenyl groups a replaced by two paramethoxyphenyl groups
D. No structure change is made to X

Answer

C

Explanation

`Ph_(3)C-OR underset(H_(2)O)overset(H^(o+))to Ph_(3)C-OH+ROH`
The reaction proceeds by `S_(N^(1))` Mechanism

Greater the electron releasing effect of the attached groups greater is the stability of intermediate carbocation , and faster is the rate of reaction.
If two pj- groups are replaced by MeO
groups , strong +M effect of MeO-groups stabilize, the carbocation better there by making the reaction faster.