1.

Molality of pure ethyl alcohol (density 0.92 g ml) is :

Answer»

15 m
92 m
46 m
20 m

Solution :Mass of ethyl alcohol in 1000ml
`=1000xx0.92=920g`
Molality `=(920)/(46)=20m` (Molecular mass of `C_(2)H_(5)OH=46`).


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