First slide

Atomic and physical properties

Question

The stability of +1 oxidation state increases in the sequence

Moderate

A

Ga < In < Al < Tl
B

Al < Ga < In < Tl
C

Tl < In < Ga < Al
D

In < Tl < Ga < Al

Solution

The given elements belongs to third group. These elements mainly exhibit +3 and +1 oxidation states.The stability of lower oxidation state, i.e., +1 state,, increases on moving down a group, the sequence of stability is Al < Ga < In < Tl

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