Question

Elements having +5 oxidation state is ____________.

Options

• Arsenic

• Antimony

• Phosphorous

• Bismuth

Answer 1

Elements having +5 oxidation state is Phosphorous.

Explanation:

The maximum oxidation state shown by a p-block element is equal to the total number of valence electrons (i.e., the sum of the s and p-electrons).

P: [Ne]3s²3p³

Total valence electrons = 5 so it will show +5 oxidation state.

The stability of the +5 oxidation state decreases down the group due to the inert pair effect.