Question

Nine volumes of a gaseous mixture consisting of gaseous organic compound A and just sufficient amount of oxygen required for compelete combusition yilded on burning four volumes `C_2`. Six volumes of water vapour, and two volumes of `N_2`, all volumes measured at the same temperature and pressure. If the compound contains C, H and N only, the molecular formula of the compound A is:
A. `C_2H_3N_2`
B. `C_2H_6N_2`
C. `C_3H_6N_2`
D. `C_3H_6N`

Answer 1

Correct Answer - B
`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`