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NEET2023ChemistryElectrochemistryActual

The E^ values for aligned & Al ⁺ / Al =+0.55 ~V and Tl ⁺ / TI =-0.34 ~V & Al ³⁺ / Al =-1.66 ~V and Tl ³⁺ / TI =+1.26 ~V aligned Identify the incorrect statement.

Options

  1. AAl ⁺ is unstable in solution.
  2. BTI can be easily oxidised to Tl ⁺ than Tl ³⁺ .
  3. CAl is more electropositive than TI .
  4. DTl ³⁺ is a good reducing agent than Tl ¹⁺ .

Correct answer

D. Tl ³⁺ is a good reducing agent than Tl ¹⁺ .

Step-by-step solution

(1) Al ⁺ is unstable in solution because SRP of Al ⁺ / Al is positive hence, it will get reduced in solution. (2) array ll Tl / Tl ⁺=+0.34 & ( SOP ) Tl / Tl ³⁺=-1.26 & ( SOP ) array Since, SOP TI/TI > TI/T1 ⁺ Hence, TI will get oxidised to Tl ⁺ easily than Tl ³⁺ (3) Since Al ^2 / Al ³⁺ has more SOP than Tl / Tl ⁺ it will be more electropositive (4) Since aligned Tl ³⁺+2 e ⁻ Tl ⁺ ; E = 3 1.26+0.34 2 =+2.04 aligned Hence, Tl ³⁺ is better oxidising agent not reducing agent

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