A current of 2.0A passed for 5 hours through a molten metal salt deposits 22.2 g of metal (At. Wt. =177). The oxidation state of the metal in the metal salt is

Options

A. `+ 1`
B. `+2`
C. `+3`
D. `+4`

Answer

C

Explanation

`W = )I t E)(96500)`
`E = (W xx 96500)/(I t) = (22.2 xx 96500)/(2 xx 5 xx 3600) = 59.5`
Equivalent mass `= ("Atomic mass")/("Oxidation state")`
`59.5 = (177)/(n)`
`:. N ~~ 3`