UPSC Combined Geo-Scientist, Mains · 2019 · Mains Paper II
Q15(b). Increasing ¹H chemical shift of six compounds
Question
In connection with the ¹H NMR spectrum, arrange the following compounds in increasing order of chemical shift, with reason: (i) CH₂Cl₂ (ii) cyclohexane (iii) CH₄ (iv) CH₃COCH₃ (v) CH₂=CH₂ (vi) C₆H₆.
Model answer
The free solution for 2019 answers questions 1, 2, 3, 4, 6, 8, 9, 11, 12 and 13, 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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All parts of Question 15
- 15(a) Why KCl, not NaCl, in a salt bridge5 marks
- 15(b) Increasing ¹H chemical shift of six compounds5 marks
- 15(c) Rotational constant; bond length of H¹²⁷I from microwave spacing10 marks