1.

How many electrons are transferred from reductant to oxidant is the following redox As_(2)S_(3) + HNO_3 rarr H_3ASO_(4) + H_2SO_4+NO

Answer»

2
4
24
84

Solution :Oxidant `[3e^(-)+overset(5+)Nrarroverset(2+)N]xx28`
Reductant `overset(3+)(As_2)rarr2As^(5+)+4E^(-)
S_3^(2-)rarr 3s^(6+)+24e^(-)`
`(As_(2)S_3rarr2A_(s)^(5)+3s^(6+)+28)xx3`


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