Water gas contains $\mathrm{CO}$ and ${\mathrm{H}}_2$ in mole ratio, $1:1 A$ nickel ore containing ${\mathrm{Ni}}_2{\mathrm{O}}_3$ may be reduced into Ni as :

${\mathrm{Ni}}_2{\mathrm{O}}_3\left(s\right)+3{\mathrm{H}}_2\left(\mathrm{g}\right)\to 2\mathrm{Ni}\left(s\right)+3{\mathrm{H}}_2\mathrm{O}\left(g\right)$

But due to presence of $\mathrm{CO}\left(\mathrm{g}\right)$, the nickel formed get converted into $\mathrm{Ni}\left(\mathrm{CO}{)}_x\right(g)$. Both the reaction occurs 100 %. If  240 gm  water gas is needed to convert one mole of ${\mathrm{Ni}}_2{\mathrm{O}}_3\left(s\right)$ into $\mathrm{Ni}\left(\mathrm{CO}{)}_x\right(\mathrm{g})$, the value of x is :