question_answer

Addition of sodium hydroxide solution to a weak acid (HA) results in a buffer of pH 6. If ionization constant of HA is 10-5, the ratio of salt to acid concentration in the buffer solution will be :     [JEE Online 08-04-2017]

A)  10 : 1                    

B)  4 : 5

C)  5 : 4                                      

D)  1 : 10