Indian Forest Service (Mains), Chemistry optional · 2016 · Paper I

Q8(a)(ii). Superacids

10 marks
Topic: Non-aqueous solvents
Question only

Question

What is ‘superacid’? Give two chemical properties to justify this nomenclature.

Model answer

The 2016 solution on this site answers questions 1, 2, 4, 5 and 7, 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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Topic notes: non-aqueous solvents: liquid ammonia, HF, sulfuric acid, SO₂, BrF₃ and superacids, with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversHammett acidity functionsuperacidcarbocationssuperelectrophiles

All parts of Question 8

8(a)(i) Liquid ammonia as a solvent10 marks
8(a)(ii) Superacids10 marks
8(b)(i) cis-[PtCl₂(NH₃)₂] from [PtCl₄]²⁻4 marks
8(b)(ii) trans-[PtCl₂(NH₃)₂]: starting material and steps6 marks
8(c)(i) Oxidative addition5 marks
8(c)(ii) Oxidative addition against insertion5 marks