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The stability of +1 oxidation state amon...

The stability of `+1` oxidation state among `Al,Ga,In` and `Tl` increases in the sequence

A

`Al lt Ga lt ln lt Tl`

B

`Tl lt ln lt Ga lt Al`

C

`ln lt Tl lt Ga lt Al`

D

`Ga lt Ln lt Al lt Tl`

Text Solution

Verified by Experts

The correct Answer is:
A
The given elements belong to third group . These elements mainlly exhibit `+3` and `+1` oxidation state. As we know, on the stability down a group due to inert pair effect. Thus, the sequence of stability of +1 state is
`Al lt Ga lt In lt Tl`
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