Question

The sum of oxidation states of all atoms in \[\ce{SnO^{2-}_2}\] and CO₂ are ____________ respectively.

Options

• 0 and −1

• −2 and −1

• −2 and −2

• −2 and 0

Answer 1

The sum of oxidation states of all atoms in \[\ce{SnO^{2-}_2}\] and CO₂ are −2 and 0 respectively.

Explanation:

The charge on an ion is equal to the sum of the oxidation numbers of the atoms in the ion. In a neutral molecule, the total oxidation number of the atoms is zero.