Which equilibrium can be described as an acid- base reaction using the Lewis acid-base definition but not using the Bronsted-Lowry definition

Options

A. `NH_(3)+CH_(3)COOHhArrCH_(3)COO^(-)+NH_(4)^(+)`
B. `H_(2)O+CH_(3)COOHhArrH_(3)O^(+)+CH_(3)COO^(-)`
C. `4NH_(3)+[Cu(H_(2)O)_(4)]^(2+)hArr[Cu(NH_(3))_(4)]^(2+)+4H_(2)O`
D. `2NH_(3)+H_(2)SO_(4)hArr2NH_(4)^(+)+SO_(4)^(2-)`

Answer

C

Explanation

The pair of electrons present at nitrogen (in `NH_(3)` : Lewis base )is donated to `Cu^(2+)` (Lewis acid).