Question

Statement 1:Oxidation number of carbon in $CH_{2}O$ is zero.
Statement 2:$CH_{2}O$ formaldehyde, is a covalent compound.

• A. If both Statement 1 and Statement 2 are true and the statement 2 is the correct explanation of the statement 1.
• B. Ifboth Statement 1 and Statement 2 are true but statement 2 is not the correct explanation of the statement 1.
• C. If Statement 1 is true but Statement 2 is false.
• D. If Statement 1 is false but Statement 2 is true.

Answer 1

Answer: (B)

Both statements are true but statement 2 is not the correct explanation of statement 1. Oxidation number can be calculated using some rules. H is assigned +1 oxidation state and O has oxidation number-2
$\therefore $ O. No. of C in $CH_{2}O:$
O. no. of $C + 2 (+ l) + ( - 2) = 0$
$\therefore $ O. No. of $C = 0$