NEET 2009 Chemistry question

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

(1)Tl < In < Ga < Al
(2)In < Tl < Ga < Al
(3)Ga < In < Al < Tl
(4)Al < Ga < In < TlCorrect

Answer: (4)

Solution

In group 13 the stability of the lower (+1) oxidation state increases down the group because of the inert pair effect (reluctance of the electrons to take part in bonding). The

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Question ID VK-090291