1.

An organic compound having C,H and sulphur contains 4% of sulphur. The minimum molecular weight of compound is

Answer»

200
400
600
800

Solution :`%` of `S = ("WT. of 1 sulphur atom")/(" Minimum mol. Wt.") xx 100`
`4 = (32)/(" Minimum mol.wt.") xx 100`
Minimum mol. Wt =` 800 g mol^(-1)`
(a) , (B) and (c ) are not POSSIBLE.
Alternate Method: A compound MUST have at leat one atom of S i.e, `32g` of S.
4gof sulphur is PRESENT in 100 g of compound.
`32g` of sulphur will be present in `(100)/(4) xx 32 = 800 g mol^(-1)`.


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