A gas in an open container is treated from` 27^(@)C` to `127^(@)C` . The fraction of original amount of gas remaining in the container will be

Options

A. `(3)/(4)`
B. `(1)/(4)`
C. `(1)/(2)`
D. `(1)/(8)`

Answer

1

Explanation

On heating a gas in a open container (P and V constant )
moles of gas go out
Thus `n_(1)T_(1)=n_(2)T_(2)`
or`" "n_(1)xx300=n_(2)xx400`
`n_(2)=(3n_(1))/(4)`
`:. " "` Fraction of moles & gas left `=(n_(2))/(n_(1))=(3n_(2))/(4n_(1))=(3)/(4)`