Which of the statements is not true ?

Options

A. `K_(2)Cr_(2)O_(7)` solution in acidic medium is orange
B. `K_(2)Cr_(2)O_(7)` solution becomes yellow on increasing the pH beyond 7
C. On passing `H_(2)S` through acidified `K_(2)Cr_(2)O_(7)` solution, a milky colour is observed
D. `Na_(2)Cr_(2)O_(7)` is preferred over `K_(2)Cr_(2)O_(7)` in volumetric analysis

Answer

D

Explanation

Because `Na_(2)Cr_(2)O_(7)` is hygroscopic