Question

Group 13 elements exhibit

• A. Only +3 Oxidation state
• B. Only + 1 oxidation state
• C. Both +1 and +3 oxidation states
• D. +1, +2 and +3 oxidation states.

Answer 1

The correct option is C Both +1 and +3 oxidation states

As there are 3 electrons in the valence shell of group 13 elements they show +3 oxidation state. Also in case of heavier members, due to inert pair effect, +1 oxidation state is also most stable oxidation state. Hence, it shows both +1 and +3 oxidation state.