UPSC Combined Geo-Scientist, Mains · 2019 · Mains Paper I
Q3(d). Stability of +3 state of Al, Ga, In and Tl from E° values
Question
Standard electrode potentials (E°) of M³⁺/M of Al, Ga, In and Tl in aqueous solution are −1.66, −0.56, −0.34 and +1.26 V, respectively. What would you infer on the stabilities of their +3 oxidation state?
Model answer
The free solution for 2019 answers questions 1, 2, 4, 6, 9 and 11, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.
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Coversinert pair effectgroup 13thallium(I)electrode potential
All parts of Question 3
- 3(a) Structures and pKa order of H₃PO₄, H₃PO₃ and H₃PO₂10 marks
- 3(b) Borazine: inorganic benzene, resonance and reactivity10 marks
- 3(c) Copper wire in silver nitrate solution5 marks
- 3(d) Stability of +3 state of Al, Ga, In and Tl from E° values5 marks