question_answer

Solution of 0.1 N \[N{{H}_{4}}OH\] and 0.1 N \[N{{H}_{4}}Cl\] has pH 9.25, then find out \[p{{K}_{b}}\] of \[N{{H}_{4}}OH\].                                                                                                       [AIPMT 2002]

A)        9.25                

B)       4.75                

C)  3.75      

D)   8.25

Correct Answer: B

Solution :

Solution of  and  acts as a basic buffer solution. For basic buffer solution