1.

9.9g of amide with molecular formula C_(4)H_(5)N_(x)O_(y) on heating with alkali liberated 1.7g of ammonia. If the percentage of oxygen is 33.33% then the ratio of 'N' and 'O' atoms in the compound is:

Answer»

`1:1`
`1:2`
`2:3`
`3:2`

SOLUTION :Amide `C_(4)H_(5)N_(x)O_(y)` will give x mol `NH_(3)`.
`:.` MOLECULAR MASS of amide `=(9.9)/(1.7) xx 17x = 99x`
% NITROGEN in the amide `= (14x)/(99x) xx 100 = 14.14`
Ratio of number of atoms of 'N' and 'O'
`= (14.14)/(14): (33.33)/(16) = 1:2`


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