Question

Match the compounds given in list I with the oxidation state of their carbon given in list II.

Answer 1

(A) In CO, the oxidation state of carbon is $+2$ as oxygen has $-2$ and so, the compound is overall neutral.

(B) In HCN, the oxidation state of carbon is $+2$ as nitrogen is in -3 oxidation state and H in $+1$.

(C) In $H_{2}C{O}_3$, the oxidation state of carbon is $+4$ as hydogen has $+$ valency and $O$ has $-2$ valency.

(D) In $Ca{C}_2$, the oxidation state of carbon is $-2$ as $C{a}^{2+}$ has valency of $+2$.