JEE Main 2022 · 26 Jun · Shift 1 · Chemistry Q66

ChemistrySingle correct+4 / -1Question 66 of 90

Choose the correct stability order of group 13 elements in their +1 oxidation state.

Al < Ga < In < Tl

Tl < In < Ga < Al

Al < Ga < Tl < In

Al < Tl < Ga < In

Answer and worked solution

Official answer: A

Inert pair effect. Down group 13 the $ns^2$ pair is held more tightly, so the +1 state becomes more stable: Al < Ga < In < Tl.

(A)

Topics:Group 13

JEE Main 2022 · 26 Jun · Shift 1, Chemistry question 66