MCQ
A litre of buffer solution contains $0.1$ mole of each of $NH _3$ and $NH _4 Cl$. On the addition of $0.02\,mole$ of $HCl$ by dissolving gaseous $HCl$, the $pH$ of the solution is found to be $......\times 10^{-3}($ Nearest integer)
$\left[\right.$ Given : $pK _{ b }\left( NH _3\right)=4.745$
$\log 2=0.301$
$\log 3=0.477$
$T =298\,K ]$
- A$9080$
- ✓$9079$
- C$9081$
- D$9082$
