Liquid benzene burns in oxygen according to `2C_(6)H_(6)(1)+150_(2)(8) to12CO_(2),(g)+6H_(2)O(g)`. How many litres of oxygen are required for complete combustion of 39g of liquid `C_(6)H_(6)` (atomic wt.of C=12, 016)?

Options

A. 11.2
B. 22.4
C. 42
D. 84

Answer

D

Explanation

The following reaction takes places when liquid benzene burns in oxygen.
`2C_(6)H_(6)+150_(2)to12CO_(2)+6H_(2)O`
`2xx78g 15xx22.4L`
The volume of `O_(2)` required for complete combustion of ` 2 xx78g` of `C_(6)H_(6)` is `xx22.4L`
Therefore , the volume of `O_(2)` required for combustion of 39g of `C_(6)H_(6)=(15xx22.4xx39)/(2xx78)=84L`