JEE MAIN - Chemistry (2025 - 7th April Evening Shift - No. 2)

The correct statements from the following are :

(A) Tl³⁺ is a powerful oxidising agent

(B) Al³⁺ does not get reduced easily

(D) Tl¹⁺ is more stable than Tl³⁺

(E) Al³⁺ and Tl¹⁺ are highly stable

Choose the correct answer from the options given below :

(A), (B), (D) and (E) only

(A), (C) and (D) only

(A), (B), (C) and (E)

(B), (D) and (E) only

(i) True: Tl¹⁺ is more stable than Tl³⁺ due to the inert pair effect. Therefore, Tl³⁺ acts as a powerful oxidizing agent.

(ii) True: The standard reduction potential for Al^3+/Al is -1.66 V, indicating that Al³⁺ is difficult to reduce and thus highly stable.

(iii) False: Tl³⁺ is not stable in solution.

(iv) True: Tl¹⁺ is more stable than Tl³⁺.

(v) True: Both Al³⁺ and Tl¹⁺ are highly stable in their respective oxidation states.