A 200 ml mixture of $\mathrm{CO}$ and ${\mathrm{CO}}_2$ is passed through excess of red hot charcoal causing the following reaction

${\mathrm{CO}}_2\left(g\right)+\mathrm{C}\left(s\right)⟶2\mathrm{CO}\left(g\right)$

After passing the gas through charcoal, volume increased to 270 ml. Select the correct statement(s)

Volume percentage of $\mathrm{CO}$ in the original mixture is $65\%$

 

If original mixture was passed through $\mathrm{KOH}$ solution volume would have reduced to  $70 \mathrm{ml}$

Mole fraction of  ${\mathrm{CO}}_2$ in the original mixture will be $0.35$

Minimum moles of red hot chareoal required for complete conversion of  ${\mathrm{CO}}_2$ should be $70$ millimoles