Question

`0.46 g` ofan organic compound containing C,H oxygen was heated stronglyin steam of `N_(2)` gas . The gaseous mixture thus obtained was passed over heated coke at `1373 K` and then passed through warm solution of iodine pentoxide when `2.54 g` of iodine. The percentage of `O_(2)` in the compound is
A. `69.59`
B. `34.78`
C. `47.38`
D. `38.47`

Answer 1

Correct Answer - A
`%` of oxygen `= 31/254 xx (" wt. of" I_(2)"formed")/(" wt. of organic compound") xx 100`
`= 32/254 xx (2.54)/(0.46) xx 100 = (32)/(0.46) = 69.56%`
(b) , (c ) and (d) are not possible.