One mole of ammonia was completely absorbed in one litre solution each of `(1) 1 M HCI , (2) 1 M CH_(3)COOH " and "(3) 1 M H_(2)SO_(4)` at 298 K. The decreasing order for the pH of the resulting solution is
(Given , `K_(b) (NH_(3)) = 4.74 )`

Options

A. `2 gt 3 gt 1`
B. `1 gt 2 gt 3`
C. `2 gt 1 gt 3`
D. `3 gt 2 gt 1`

Answer

C

Explanation

`underset(CH_3COOH gt HCl gt H_2SO_4)overset("Decreasing order of pH")to`
`underset("Increasing order of pH")overset((2)" "(1)" "(3))to`