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QAIPMT-2009-Ch-2110: NEET 2009 Chemistry - Class 12 AIPMT-2009-Ch-2110 Solution: The stability of +1 oxidation state among Al, Ga, In and Tl…

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

Multiple Choice Options

A $Al<Ga<In<Tl$
B $Tl<In<Ga<Al$
C $In<Tl<Ga<Al$
D $Ga<In<Al<Tl$

Step-by-Step Verified Solution

The given elements belong to 13th group. The elements mainly exhibit +3 and +1 oxidation states. As we know, the stability of lower oxidation state i.e., +1 state, increases on moving down the group due to inert pair effect. The, stability follows the order : Al < Ga < In < Tl

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