question_answer

\[100\,ml,\] \[\frac{N}{5}\,N{{H}_{4}}OH\]is mixed with\[100\text{ }ml,\]\[\frac{N}{5}\,HCl\]. Then find out the pH of resulting solution while \[{{K}_{b}}={{10}^{-5}}\]:-

A)  4                    

B)  5

C)  9                    

D)  6