In presence of a strong oxidising agent `As_(2)S_(3)` is oxidised to arsiante and sulphate. What is the n-factor of `As_(2)S_(3)`

Options

A. 4
B. 18
C. 28
D. 24

Answer

C

Explanation

`As^(+3) to As^(+5) + 2e^(-)`
`S^(-2) to S^(+6) + 8e^(-)`
`As_(2)S_(3) to AsO_(3)^(3-) + SO_(4)^(2-)`