JEE PYQ: P Block Elements Question 73
Question 73 - 2019 (11 Jan Shift 2)
The relative stability of +1 oxidation state of group 13 elements follows the order:
(1) Al < Ga < Tl < In
(2) Tl < In < Ga < Al
(3) Ga < Al < In < Tl
(4) Al < Ga < In < Tl
Show Answer
Answer: (4)
Solution
Due to inert pair effect, the stability of +1 oxidation state increases as we move down in the group. Thus, correct order of stability is Al < Ga < In < Tl.