At definite temperature if the volume of system decrease then what will be change in concentration of CO ?
`2CO_((g)) + O_(2(g)) hArr 2CO_((g))`

Explanation

At the volume decrease so the total pressure increases so the reaction moves in such direction where moles are less and reaction moves in forward direction.
`ubrace(2CO_((g))+O_(2(g)))_("3 mole") hArr underset"2 mole"(2CO_(2(g))) `