IIT JAM Chemistry 2026 MOCK TEST

IIT JAM Chemistry 2026

FULL MOCK TEST (60 Questions | 3 Hours | 100 Marks)

Time Left: 03:00:00

Instructions

• Total: 60 Questions → A (30 MCQ), B (10 MSQ), C (20 NAT)
• Duration: 3 Hours
• Marking Scheme:
  • Section A: +1 or +2 marks | –⅓ or –⅔ for wrong
  • Section B: +2 marks | No negative
  • Section C: +1 or +2 marks | No negative
• Click "Submit Test" → Get Score + Rank + Detailed Solutions

Color Code: Organic | Inorganic | Physical | Spectro/Misc

SECTION A: MCQs (30 Questions | 50 Marks)

1. [GOC] The most stable carbocation is:

a) CH₃⁺ b) (CH₃)₂CH⁺ c) (CH₃)₃C⁺ d) C₆H₅CH₂⁺

2. [Coordination] The number of geometrical isomers of [Ma₃b₃] is:

a) 1 b) 2 c) 3 d) 4

3. [Thermodynamics] For reversible isothermal expansion of ideal gas, w =

a) nRT ln(V₂/V₁) b) –nRT ln(V₂/V₁) c) nRT (V₂–V₁) d) Zero

4. [Stereochemistry] Number of stereoisomers in 2,3-dibromobutane is:

a) 2 b) 3 c) 4 d) 5

5. [Periodic] The correct order of ionic radius is:

a) Na⁺ < Mg²⁺ < Al³⁺ < Si⁴⁺ b) Si⁴⁺ < Al³⁺ < Mg²⁺ < Na⁺ c) Na⁺ < Si⁴⁺ < Mg²⁺ < Al³⁺ d) Al³⁺ < Si⁴⁺ < Na⁺ < Mg²⁺

6. [Kinetics] Half-life of first-order reaction is 10 min. Time for 75% completion:

a) 10 min b) 20 min c) 30 min d) 40 min

7. [Reagents] Anti-Markovnikov hydration reagent:

a) H₃O⁺ b) BH₃/THF, H₂O₂, OH⁻ c) Hg(OAc)₂, H₂O d) OsO₄

8. [Organometallic] Highest ν(CO) in:

a) [Mn(CO)₆]⁺ b) Cr(CO)₆ c) [V(CO)₆]⁻ d) Fe(CO)₅

9. [Quantum] Degeneracy of d-orbitals in octahedral field:

a) 2 b) 3 c) 5 d) Both b and a

10. [Name Reaction] Cannizzaro reaction is shown by:

a) Acetone b) Acetaldehyde c) Benzaldehyde d) Acetophenone

11. [Coordination] Hybridization of [Ni(CN)₄]²⁻:

a) sp³ b) dsp² c) sp³d d) d²sp³

12. [Electrochemistry] Nernst equation for Zn | Zn²⁺ || Cu²⁺ | Cu:

a) E = E° – (0.059/2) log([Zn²⁺]/[Cu²⁺]) b) E = E° – (0.059/2) log([Cu²⁺]/[Zn²⁺]) c) E = E° – 0.059 log([Zn²⁺]/[Cu²⁺]) d) E = E°

13. [Pericyclic] Diels-Alder is:

a) [2+2] b) [4+2] c) [3+2] d) [1+1]

14. [Bioinorganic] Metal in vitamin B₁₂:

a) Fe b) Co c) Zn d) Mg

15. [Surface] Freundlich isotherm:

a) x/m = k P^(1/n) b) x/m = k / P c) x/m = k P d) x/m = k

16. [NMR] Number of ¹H NMR signals in CH₃CH₂OCH₂CH₃:

a) 2 b) 3 c) 4 d) 5

17. [Solid State] Packing efficiency of FCC:

a) 52% b) 68% c) 74% d) 100%

18. [Nuclear] Half-life of ¹⁴C is 5730 yr. Age if 25% left:

a) 5730 yr b) 11460 yr c) 2865 yr d) 17190 yr

19. [Carbohydrate] Anomeric carbon in glucose:

a) C1 b) C2 c) C5 d) C6

20. [CFSE] CFSE for d⁵ high spin octahedral:

a) –2.0 Δ₀ b) 0 c) +0.4 Δ₀ d) –0.4 Δ₀

21. [Quantum] Zero-point energy of harmonic oscillator:

a) 0 b) (1/2) hν c) hν d) (3/2) hν

22. [Aromaticity] Compound with 6π electrons aromatic:

a) Cyclobutadiene b) Benzene c) Tropylium cation d) Both b and c

23. [Magnetic Moment] μ of [MnBr₄]²⁻:

a) 1.73 BM b) 2.83 BM c) 4.90 BM d) 5.92 BM

24. [Spectroscopy] Selection rule for rotational spectroscopy:

a) ΔJ = ±1 b) ΔJ = 0, ±1 c) ΔJ = 0 d) ΔJ = ±2

25. [Amino Acid] Zwitterion form at pH = pI for:

a) Glycine b) Lysine c) Aspartic acid d) All

26. [Lanthanide] Cause of lanthanide contraction:

a) Poor shielding of 4f b) Good shielding of 5d c) Increase in nuclear charge d) Decrease in atomic number

27. [Thermodynamics] Joule-Thomson coefficient for ideal gas:

a) Positive b) Negative c) Zero d) Infinite

28. [Polymer] Monomer of Teflon:

a) CH₂=CH₂ b) CH₂=CHCl c) CF₂=CF₂ d) CH₂=C(CH₃)COOH

29. [Jahn-Teller] Maximum distortion in:

a) d⁴ high spin b) d⁹ c) d⁵ high spin d) d¹⁰

30. [Mass] Base peak in CH₃CH₂OH mass spectrum:

a) 15 b) 31 c) 45 d) 46

SECTION B: MSQs (10 Questions | 20 Marks)

31. [Stereochemistry] Which are meso?

a) meso-Tartaric acid b) (2R,3R)-2,3-Dibromobutane c) trans-1,2-Dichlorocyclopentane d) 2,3-Pentanediol (eryth.)

32. [Coordination] Which follow 18-electron rule?

a) Fe(CO)₅ b) Ni(CO)₄ c) [Co(NH₃)₆]³⁺ d) Cr(CO)₆

33. [Thermodynamics] Which are state functions?

a) ΔH b) q c) w d) ΔU

34. [Reagents] Which give anti addition?

a) Br₂/CCl₄ b) OsO₄ c) m-CPBA d) BH₃

35. [Inorganic] Which are diamagnetic?

a) [Ni(CN)₄]²⁻ b) [NiCl₄]²⁻ c) [CoF₆]³⁻ d) [Fe(CN)₆]⁴⁻

36. [Quantum] Which have nodes?

a) 1s b) 2p c) 3d d) 4f

37. [Pericyclic] Which are thermally allowed?

a) [4+2] cycloaddition b) [2+2] cycloaddition c) Electrocyclic 4π d) Electrocyclic 6π

38. [Solid State] Which have Schottky defect?

a) NaCl b) CsCl c) AgBr d) ZnS

39. [Electrochemistry] Which are correct for Daniell cell?

a) Zn is anode b) Cu is cathode c) E° > 0 d) ΔG < 0

40. [Spectroscopy] Which absorb in UV?

a) Benzene b) Acetone c) Ethanol d) Both a and b

SECTION C: NAT (20 Questions | 30 Marks)

41. [Kinetics] t₁/₂ = 20 min (1st order). Time for 87.5% completion (min):

42. [Coordination] EAN of Fe in Fe(CO)₅:

43. [GOC] Number of α-hydrogens in (CH₃)₃CCHO:

44. [Quantum] Radial nodes in 3p orbital:

45. [Coordination] Unpaired electrons in [Fe(H₂O)₆]²⁺:

46. [Thermodynamics] ΔS for isothermal reversible expansion (J/K) if q_rev = 1000 J, T = 300 K:

47. [Pericyclic] Number of π electrons in furan:

48. [Nuclear] Mass number of daughter if ²³⁸₉₂U → ²⁰⁶₈₂Pb + x α + y β:

49. [Electrochemistry] n in Nernst equation for Fe³⁺ + e⁻ → Fe²⁺:

50. [NMR] Chemical shift of aldehyde proton (ppm):

51. [Solid State] Number of atoms per unit cell in BCC:

52. [Kinetics] Unit of k for zero-order reaction (mol L⁻¹ s⁻¹):

53. [Carbohydrate] Number of chiral carbons in β-D-glucopyranose:

54. [CFSE] CFSE for d⁶ low spin octahedral (in Δ₀):

55. [Surface] Value of 1/n in Freundlich for physical adsorption:

56. [Amino Acid] pI of alanine (pKa1=2.34, pKa2=9.69):

57. [Organometallic] Hapticity of Cp in ferrocene:

58. [Quantum] Commutator [x, p]:

59. [IR] C=O stretch frequency (cm⁻¹):

60. [Polymer] Degree of polymerization if Mn = 10000, monomer MW = 100:

TEST COMPLETED!

Score: 0 / 100

Predicted Rank: Calculating...