1.

When a salt reacts with water resulting into formation of acidic or basic solution, the process is referred to as salt hydrolysis. The pH of salt solution can be calculated using the following equations. pH = ( 1)/(2) ( p K_(w) + pK_(a) + log C)for salt of weak acid and strong base. pH = (1)/(2) ( pK_(w)- pK_(b) - log C )for salt of weak base and strong acid. pH = (1)/(2) ( pK_(w) + pK_(a) - pK_(b))for salt of weak acid and weak basepK_(b) of NH_(3)is 4.74 and pK_(b) of A^(-), B^(-) and C^(-)are 4,5 and 6 respectively. Aqueous solution of0.01 M has pHin the increasing order.

Answer»

`NH_(4)A ltNH_(4)B lt NH_(4) C`
`NH_(4)C lt NH_(4)B lt NH_(4)A`
`NH_(4)C lt NH_(4) A lt NH_(4) B = 7`
all have equal

ANSWER :B


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