The dissociation constant of monobasic acids `A, B,C` and `D` are `6 xx 10^(-4),5xx10^(-5), 3.6 xx 10^(-6)`, and `7 xx 10^(-10)`, respectively. The `pH` values of their `0.1M` aqueous solutions are in the order.

Options

A. `HX gt HX gt HY gt HD`
B. `HDgtHYgtHXgtHA`
C. All the solutions have same pH
D. `HXgtHDgtHYgtHA`.

Answer

B

Explanation

`[H^(+)]=sqrt(KxxC)`. Thus for same value of C, larger the value of K, greater is `[H^(+)]`, hence lower is the value of pH.