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The stability of +1 oxidation state incr...

The stability of `+1` oxidation state increases in the sequence :

A

`Tl lt In lt Ga lt Al`

B

`In lt Tl lt Ga lt Al`

C

`Ga lt In lt Al lt Tl`

D

`Al lt Ga lt In lt Tl`

Text Solution

Verified by Experts

The correct Answer is:
D
Due to the inert pair effect, group `13` elements show `+1` oxidation state also besides the group oxidation state `+3`, and the stability of lower oxidation state, i.e. `+1`, increases down the group `(darr)`.
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