50 ml of CO is mixed with 20 ml of oxygen and sparked. After reaction, the mixture is treated with an aqueous KOH solution. Choose the correct option:

The reaction takes place as,

$$\begin{gathered} \mathrm{CO} + \frac{1}{2}{\mathrm{O}}_2 \to { \mathrm{CO}}_2 \\ \begin{array}{ccc}50\mathrm{ml}& 20\mathrm{ml} & -\\ 10\mathrm{ml}& -& 40\mathrm{ml}\end{array} \end{gathered}$$

Thus, the correct options are

The volume of the CO that reacts is 40 ml.

The volume of the ${\mathrm{CO}}_2$ formed is 40 ml.

The volume of mixture obtained after reaction when treated with KOH solvent remains 10ml