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

Option: 1

Ga < In < Al < Tl


Option: 2

Al < Ga < In < Tl


Option: 3

Tl < In < Ga < Al


Option: 4

In < Tl < Ga < Al


Answers (1)

best_answer

Inert pair effect - The phenomenon in which outer shell s electrons (ns^2) penetrate to (n-1) d-electrons and thus become closer to the nucleus and are more effectively pulled by the nucleus.

This results in less availability of ns2 electrons pair for bonding or ns2 electron pair becomes inert.

 On moving down the group stability of the +1 oxidation state increases in group 13 elements.

order of stability of +1 oxidation state B<Al<Ga<In<Tl

The correct answer is option 2. 

Posted by

Gautam harsolia

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