Combustion of carbon under less supply of air,
2C+O2→2CO ....(X)
12123248 (Given moles of reactants)
Thus, carbon is the limiting reagent as for 1.5mol of Oxygen, 3 moles of carbon is required.
Thus, from equation(X) we get,
Mole of CO=1 mole
From arrhenius law,
(VCO)atSTP=22.7Lit
=227×10−1Lit