Three moles of electrons are passed through three solutions in succession containing `AgNO_3`, `CuSO_4` and `AuCL_3` respectively the molar ratio of amounts of cations reduced at cathode will be

Options

A. `1:2:3`
B. `(1)/(1):(1)/(2):(1)/(3)`
C. `3:2:1`
D. `6:3:2`

Answer

B, D

Explanation

`{:("equivalent ratio",overset(Ag)(1),overset(Cu)(1),overset(Au)(1)),("molar ratio",(1)/(1),(1)/(2),(1)/(3)),("_",6,3,2):}`