Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Qualitative Organic Analysis

25 questions · Chemistry · IIT JAM
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /IIT JAM
  3. /Chemistry
  4. /Qualitative Organic Analysis

Qualitative Organic Analysis

25 questions · Chemistry · IIT JAM

  1. Number of ¹H NMR signals observed for the following compound is ​. Includes diagram2025 · Q45 · Numerical
  2. For the following compound the number of signals expected in the 1 H NMR spectrum is ​. Includes diagram2024 · Q41 · Numerical
  3. Correct statement(s) about Q and R is/are Includes diagram2023 · Q31 · Multiple correct
  4. The number of singlets observed in the 1 H NMR spectrum of P is ​.2023 · Q52 · Numerical
  5. An organic compound having molecular formula C9​H10​O2​ exhibits the following spectral characteristics: 1H NMR: δ 9.72 (t, 1H), 7.1 (d, 2H), 6.7 (d, 2H), 3.8 (s, 3H), 3.6 (d, 2H) IR: ~1720 cm −1 The most probable structure of…2022 · Q12 · MCQ
  6. The reaction of 2,4-dinitrofluorobenzene with hydrazine produces a yellow orange solid **X** used for the identification of an organic functional group **G**. **X** and **G**, respectively, are2022 · Q21 · MCQ
  7. The number of signals observed in the ^{1}H NMR spectrum of the compound is ​.2022 · Q43 · Numerical
  8. The pigment responsible for red color in tomato has one functional group. The CORRECT statement(s) about this functional group is (are)2021 · Q34 · Multiple correct
  9. A compound shows 1 H NMR peaks at δ-values (in ppm) 7.31 (2H), 7.21 (2H), 4.5 (2H) and 2.3 (3H). The structure of the compound is2021 · Q7 · MCQ
  10. The compound(s) which will have only two signals in the ¹H NMR spectrum in 3:2 ratio is(are)2020 · Q38 · Multiple correct
  11. In ¹H NMR spectrum of the given molecule, the correct order of chemical shifts of the labelled protons (Hˣ, Hʸ, Hᶻ) is Includes diagram2019 · Q25 · MCQ
  12. The compound formed upon subjecting an aliphatic amine to Lassaigne's test is2019 · Q30 · MCQ
  13. The CORRECT order of carbonyl stretching frequencies for the following compounds is Includes diagram2018 · Q23 · MCQ
  14. The compound(s) that shows(show) positive haloform test is(are)2018 · Q37 · Multiple correct
  15. Among the following hydrocarbon(s), how many of them would give rise to three groups of proton NMR peaks with 2:2:3 integration ratio? Includes diagram2018 · Q43 · Numerical
  16. Elemental analysis of an organic compound containing C, H and O gives percentage composition: C: 39.9% and H: 6.7%. If the molecular weight of the compound is 180, the number of carbon atoms present in the molecule is2018 · Q54 · Numerical
  17. The number of proton NMR signals for the compounds P and Q, respectively, is Includes diagram2017 · Q19 · MCQ
  18. At an operating frequency of 350 MHz, the shift (in Hz) of resonance from TMS (tetramethylsilane) of a proton with chemical shift of 2 ppm is2017 · Q47 · Numerical
  19. The correct order of ¹H NMR chemical shift (δ) values for the labeled methyl groups in the following compound is Includes diagram2016 · Q11 · MCQ
  20. An organic compound on reaction with 2,4-dinitrophenylhydrazine (2,4-DNP) gives a yellow precipitate. It also gives silver mirror on reaction with ammoniacal AgNO₃. It gives an alcohol and sodium salt of a carboxylic acid on reaction with…2016 · Q15 · MCQ
  21. The correct order of the 1 H NMR chemical shift values (δ) for the indicated hydrogens (in bold) in the following compounds is Includes diagram2015 · Q20 · MCQ
  22. Which of the following compound(s) show(s) only two signals in 1 H NMR and a strong IR band at ~1690 cm −1?2015 · Q37 · Multiple correct
  23. In the given list, the total number of compounds that form a clear homogenous solution on treatment with cold dilute H 2​ SO 4​ is ​ 1-propyne, cyclohexanone, cyclohexane, 1-propene, propan-1-amine,…2015 · Q46 · Numerical
  24. The total number of compounds (shown below) that form phenylhydrazone derivatives under acidic conditions is ​ Includes diagram2015 · Q55 · Numerical
  25. An organic compound P (C 4​ H 8​ O) is positive to Bayer’s test, but inert to sodium metal. On treatment with conc. HCl, P gives CH 3​ CH 2​ Cl and CH 3​ CHO. The structure of P is2015 · Q8 · MCQ