Twenty millilitres of a gaseous hydrocarbon required 400 ml of iar for complete cumbustion. The air contains `20%` by explosion and cooling was found to be 380 ml.
Q. Formula of the hydrocarbon is:

Options

A. `C_3H_8`
B. `C_3H_6`
C. `C_3H_4`
D. `C_2H_6`

Answer

C

Explanation

`C_xH_y+(x+(Y)/(4))O_2rarrxCO_2+(y)/(2)H_2O`
`20x=60,x=3`
`20(x+(y)/(4))=80`
`y=4`
Formula of hydrocarbon `=C_3H_4`