Nine volumes of gaseous mixture consisting of gaseous organic compound A and just sufficient amount of oxygen required for complete combustion yielded on burning 4 volumes of `CO_(2)`, 6 volumes of water vapours, and 2 volumes of `N_(2)`, at all volumes measured at the same temperature and pressure. If the compounds contains `C, H`, and `N` only, the molecular formula of compound `A` is

Options

A. `C_2H_3N_2`
B. `C_2H_6N_2`
C. `C_3H_6N_2`
D. `C_3H_6N`

Answer

B

Explanation

`2C_xH_yN_z+7O_2rarr4CO_2+6H_2O+2N_2`
`{:(2x=4,,x=2),(2y=12,,y=6),(2z=4,,z=2):}`
Formula `=C_2H_6N_2`