UPSC Combined Geo-Scientist, Mains · 2018 · Mains Paper III

Q8(a). Increasing stability of carbocations

5 marks
Topic: Outside the listed units
Question only

Question

Arrange the following carbocations in order of increasing stability. Justify your answer. [carbocations given in the paper]

Model answer

The free solution for 2018 answers questions 1, 4, 5, 6, 7 and 10, 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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Coverscarbocation stabilityresonancehyperconjugationaromatic cation

All parts of Question 8

8(a) Increasing stability of carbocations5 marks
8(b) Identify the antiaromatic compound5 marks
8(c) Reagents for an alkyne-to-alkene transformation5 marks
8(d) pKa order of four carbonyl compounds5 marks
8(e) Identify A (C₁₀H₁₆O) and B from tests and ozonolysis10 marks