Assertion: Oxygen atom in both, O2 and O3 has an oxidation number of -2. Reason: Oxygen is assigned an oxidation number -2 in all of its compounds.

Question

Assertion: Oxygen atom in both, O2 and O3 has an oxidation number of -2. Reason: Oxygen is assigned an oxidation number -2 in all of its compounds. (A) If both assertion and reason are true and reason is the correct explanation of assertion. (B) If both assertion and reason are true but reason is not the correct explanation of assertion. (C) If assertion is true but reason is false. (D) If both assertion and reason are false.

Tardigrade Admin · Accepted Answer

In elements, in the free state each atom bears an oxidation number of zero. Oxidation number of oxygen in most of its compounds is -2 with two exceptions: in peroxides, oxidation number of oxygen is -1 and in superoxides, oxidation number of oxygen is -(1/2).

Q. Assertion: Oxygen atom in both, $O_{2}$ and $O_{3}$ has an oxidation number of $- 2$ .
Reason : Oxygen is assigned an oxidation number $- 2$ in all of its compounds.

If both assertion and reason are true and reason is the correct explanation of assertion.

If both assertion and reason are true but reason is not the correct explanation of assertion.

If assertion is true but reason is false.

If both assertion and reason are false.

In elements, in the free state each atom bears an oxidation number of zero. Oxidation number of oxygen in most of its compounds is $- 2$ with two exceptions : in peroxides, oxidation number of oxygen is $- 1$ and in superoxides, oxidation number of oxygen is $- \frac{1}{2}$ .

Q. Assertion: Oxygen atom in both, O2​ and O3​ has an oxidation number of −2. Reason : Oxygen is assigned an oxidation number −2 in all of its compounds.