1.

An oxide of metal `("at. wt. "= 112)` contain `12.5% O_(2)` by weight. The oxide was converted into chloride by treatment with `HCl` and electrolysed. Find the valency of metal.

Answer» Correct Answer - 2
Eq. of `O_(2) =` Eq. of metal
`(12.5)/(8) = (87.5)/(E)`
`:. E_("Metal") = (87.5 xx 8)/(12.5) = 56`
Now valency of metal `= ("At. wt.")/("E. wt.") = (112)/(56) = 2`


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