A gaseous hydrocarbon X, was burnt in excess of oxygen. A `0.112 dm^(3)` sample of X, at STP gave `0.88 g""CO_(2)`. How many C - atoms are there in one molecule of X?

Options

A. 1
B. 2
C. 3
D. 4

Answer

D

Explanation

`C _(x) H _(y) (g) + (x + (y)/(4)) O _(2) (g) to x CO _(2) (g) + (y)/(2) H _(2) O (l)`
.m. moles of hydrocarbon `= ( 0. 112)/( 22.4) xx 10 ^(3) = 5`
number of carbondixide formed = 5x
`therefore 5x = ( 0. 88 xx 1000)/(44) = 20 " " therefore x=4`