Which of the following statements is/are correct in the following reaction.
`As_(2)S_(5)+NO_(3)^(ɵ)toAsO_(4)^(3-)+NO_(2)+SO_(4)^(2-)`

Options

A. The equivalent weight of `As_(2)S_(5) is (M)/(40)`. (`M=` molecular weight of `As_(2)S_(5))`.
B. The equivalent weight of `NO_(3)^(ɵ) is (M)/(3)`.
(`M=` molecular weight of `NO_(3)^(ɵ)` ion)
C. n-factor for the conversion of `As_(2)S_(5)` to `AsO_(4)^(3-)` is zero.
D. n-factor for the conversion of `As_(2)S_(3)` to `SO_(4)^(2-)` is 30.

Answer

A, C

Explanation

(I). In `(overset(+5xx2)?(-As_(2))overset(-2xx5)/(S_(5)))`
`[:[(overset(+5)underset(2x=10)(As_(2))underset(redox)overset(no)toundersetunderset(2x=10)(2x16=-6)(2AsO_(4)^(2-))]:}(n=0)` ..(i)
`underset(5x=-10)(S_(5)^(-2))toundersetunderset(5x=30)(5x-40=-10)(5SO_(4)^(2-))+40e^(-)]` .(ii)
Add equations (i) and (ii) we get
`As_(2)O_(3)to2AsO_(4)^(3-)+5SO_(4)^(2-)+40e^(-)` `(n=40)`
`Ew=(M)/(40)`
(II). Reduction:
`{:[3e^(-)+undersetunderset(x=5)(x-6=-1)(NO_(3)^(ɵ))toundersetunderset(x=2)(x-4=2)(NO_(2))]:}^(n=3)`