UPSC Civil Services (Mains), Chemistry optional · 2021 · Paper II
Q4(b)(i). 3,3-Dimethylbut-1-ene with HCl
Question
Write the product(s) of the reaction of 3,3-dimethylbut-1-ene with HCl. [structure given in the paper]
Model answer
The free solution for 2021 answers questions 1, 2, 3, 5 and 8, the ones picked in its time plan. Question 4 is answered in full in the Chemistry Paper II, 2021 to 2025 book, with every part of every paper.
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UPSC Civil Services (Main) Chemistry Paper II: Model Answers 2021 to 2025
- All eight questions of each paper, with the question printed above its answer
- Mechanisms drawn out and labelled on the scheme
- Topic-wise weightage and a topic-wise index
Coverselectrophilic additionMarkovnikov rule1,2-methyl shiftcarbocation rearrangementHCl addition
All parts of Question 4
- 4(a)(i) Deuterium scrambling on heating 3-deuteroindene10 marks
- 4(a)(ii) Cyclopentadiene with maleic anhydride10 marks
- 4(b)(i) 3,3-Dimethylbut-1-ene with HCl5 marks
- 4(b)(ii) Allyl bromide with HBr, without and with benzoyl peroxide10 marks
- 4(c)(i) A Wittig reaction and a Fischer indole synthesis10 marks
- 4(c)(ii) Pairs that give an α,β-unsaturated carbonyl compound with base5 marks