Q. The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence :
A) Tl < In < Ga < Al
B) In < Tl < Ga < Al
C) Ga < In < Al < Tl
D) Al < Ga < In < Tl
Explanation
[Solution] Owing to the inert pair effect, +1 stability increases down the group: Al < Ga < In < Tl. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.