A gas mixture contains accetylene and carbondioxide. 20 litres of this mixture required 20 litres of oxygen for complete combustion. If all gases are measured under similar conditions of temperature and pressure, the percentage of acetylene in the mixture is

Options

A. `50%`
B. `40%`
C. `60%`
D. `75%`

Answer

B

Explanation

`C_(2)H_(2) = (20)/(50) xx 100`
1 lit `-(5)/(2)` lit
20 lit - ? 50 lit
`%C_(2)H_(2) = (20)/(50) xx 100`