The relative stability of +1 oxidation state progressively increases for heavier elements due to inert pair effect. ∴ Stability of Aℓ+1<Ga+1<In+1<Tℓ+1
Give below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The stability order of +1 oxidation state of Ga, In and T1 is Ga<In< T1. Reason R: The inert pair effect stabilizes the lower oxidation state down the group. In the light of the above statements, choose the correct answer from the options given below:
Held on 8 Apr 2024 · Verified 6 Jul 2026.
A is true but R is false.
A is false but R is true.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
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