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Chemistry · 2022

55 questions from this IIT JAM paper
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Chemistry · 2022

55 questions from this IIT JAM paper

Organic Reaction Mechanism and Synthetic Applications9 questionsMain Group Elements3 questionsChemical Bonding and Shapes of Molecules6 questionsBioinorganic Chemistry2 questionsChemical Kinetics1 questionsAdsorption1 questionsQualitative Organic Analysis3 questionsSolid State4 questionsTransition Metals5 questionsSpectroscopy2 questionsAtomic and Molecular Structure3 questionsLiquid State1 questionsGaseous State1 questionsChemical and Phase Equilibria3 questionsBasic Concepts and Stereochemistry3 questionsChemical Thermodynamics2 questionsAromatic and Heterocyclic Chemistry1 questionsAnalytical Chemistry2 questionsElectrochemistry2 questionsExtractions of Metals1 questions
  1. Q1.The reagent required for the following transformation is
    Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
  2. Q4.The major product formed in the following reaction K+O2​→ is
    Chemistry · Main Group Elements · MCQ
  3. Q5.Which one of the following options is best suited for effecting the transformation? HO CHO HO CO_{2}H
    Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
  4. Q6.The structure of [XeF_{8}]^{2-} is
    Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
  5. Q7.Among the following, the compound that forms the strongest hydrogen bond is
    Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
  6. Q8.Among the following, the biomolecule with a direct metal-carbon bond is
    Chemistry · Bioinorganic Chemistry · MCQ
  7. Q9.For the reaction extH2​extPO2−​(aq)+extOH−(aq)→extHPO32−​(aq)+extH2​(g) the rate expression is k[extH2​extPO2−​][extOH−]2. If the concentration of extH2​extPO2−​ is doubled, the…
    Chemistry · Chemical Kinetics · MCQ
  8. Q10.The nature of interaction involved at the gas-solid interface in physisorption is
    Chemistry · Adsorption · MCQ
  9. Q11.The major product formed in the following reaction is Includes diagram
    Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
  10. Q12.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…
    Chemistry · Qualitative Organic Analysis · MCQ
  11. Q13.The major product formed in the reaction of (2S,3R)-2-chloro-3-phenylbutane with NaOEt in EtOH is
    Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
  12. Q15.The reactivity of the enol derivatives towards benzaldehyde follows the order
    Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
  13. Q16.All possible lattice types are observed in the
    Chemistry · Solid State · MCQ
  14. Q17.The structure types of B_{10}H_{10}^{2-} and B_{10}H_{14}, respectively, are
    Chemistry · Main Group Elements · MCQ
  15. Q18.The ground state and the maximum number of spin-allowed electronic transitions possible in a Co^{2+} tetrahedral complex, respectively, are
    Chemistry · Transition Metals · MCQ
  16. Q19.The correct statement about the geometries of BH_{2}^{+} and NH_{2}^{+} based on valence shell electron pair repulsion (VSEPR) theory is
    Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
  17. Q20.The order of increasing CO stretching frequencies in [Co(CO)_{4}]^{-}, [Cu(CO)_{4}]^{+}, [Fe(CO)_{4}]^{2-} and [Ni(CO)_{4}] is
    Chemistry · Transition Metals · MCQ
  18. Q21.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, are
    Chemistry · Qualitative Organic Analysis · MCQ
  19. Q22.The stability of adducts H_{3}B·PF_{3}, H_{3}B·NMe_{3}, H_{3}B·CO, H_{3}B·OMe_{2} follows the order
    Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
  20. Q23.The spacing between successive rotational energy levels of a diatomic molecule XY and its heavier isotopic analogue X'Y' varies with the rotational quantum number, J, as
    Chemistry · Spectroscopy · MCQ
  21. Q24.The ratio of the 2p → 1s transition energy in He + to that in the H atom is closest to
    Chemistry · Atomic and Molecular Structure · MCQ
  22. Q26.Capillary W contains water and capillary M contains mercury. The contact angles between the capillary wall and the edge of the meniscus at the air-liquid interface in W and M are θW​ and θM​, respectively. The contact angles…
    Chemistry · Liquid State · MCQ
  23. Q27.The Maxwell-Boltzmann distribution f( vx​) of one-dimensional velocities vx​ at temperature T is [Given: A is a normalization constant such that ∫−∞∞​f( vx​)d vx​=1 and kB​ is the Boltzmann constant]
    Chemistry · Gaseous State · MCQ
  24. Q28.The potential for a particle in a one-dimensional box is given as: V(x)=0 for 0≤x≤L, and V(x)=∞ elsewhere. The locations of the internal nodes of the eigenfunctions ψn​(x), n≥2, are [Given: m is an…
    Chemistry · Atomic and Molecular Structure · MCQ
  25. Q29.The number of CO stretching bands in the infrared spectrum of Fe(CO)_{5} is
    Chemistry · Transition Metals · MCQ
  26. Q30.The standard Gibbs free energy change for the reaction H_{2}O (g) → H_{2} (g) + ½ O_{2} (g) at 2500 K is +118 kJ mol^{-1}. The equilibrium constant for the reaction is [Given: R = 8.314 J K^{-1} mol^{-1}]
    Chemistry · Chemical and Phase Equilibria · MCQ
  27. Q31.Among the following, the reaction(s) that favor(s) the formation of the products at 25 °C is/are
    Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
  28. Q32.Among the following, the correct statement(s) is/are:
    Chemistry · Basic Concepts and Stereochemistry · Multiple correct
  29. Q33.The compound(s) that participate(s) in Diels-Alder reaction with maleic anhydride is/are
    Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
  30. Q34.Among the following, the suitable route(s) for the conversion of benzaldehyde to acetophenone is/are
    Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
  31. Q35.The reaction involve(s)
    Chemistry · Transition Metals · Multiple correct
  32. Q36.The reason(s) for the lower stability of Si_{2}H_{6} compared to C_{2}H_{6} is/are
    Chemistry · Main Group Elements · Multiple correct
  33. Q37.For an N-atom nonlinear polyatomic gas, the constant volume molar heat capacity C_{v,m} has the expected value of 3(N - 1)R, based on the principle of equipartition of energy. The correct statement(s) about the measured value of C_{v,m}…
    Chemistry · Chemical Thermodynamics · Multiple correct
  34. Q38.Zinc containing enzyme(s) is/are
    Chemistry · Bioinorganic Chemistry · Multiple correct
  35. Q39.The conversion of ICl to ICl^{+} involve(s)
    Chemistry · Chemical Bonding and Shapes of Molecules · Multiple correct
  36. Q40.The common point defect(s) in a solid is/are
    Chemistry · Solid State · Multiple correct
  37. Q41.Among the following the number of aromatic compounds is ​. Includes diagram
    Chemistry · Aromatic and Heterocyclic Chemistry · Numerical
  38. Q42.The number of stereoisomers possible for the major product formed in the reaction is ​. Includes diagram
    Chemistry · Basic Concepts and Stereochemistry · Numerical
  39. Q43.The number of signals observed in the ^{1}H NMR spectrum of the compound is ​.
    Chemistry · Qualitative Organic Analysis · Numerical
  40. Q44.The reaction of 122 g of benzaldehyde with 108 g of phenylhydrazine gave 157 g of the product. The yield of the product is ​ %. (round off to the nearest integer)
    Chemistry · Organic Reaction Mechanism and Synthetic Applications · Numerical
  41. Q45.The B–B bond order in B_{2} is ​.
    Chemistry · Chemical Bonding and Shapes of Molecules · Numerical
  42. Q46.The number of unpaired electrons in [Co(H_{2}O)_{6}]^{2+} is ​.
    Chemistry · Transition Metals · Numerical
  43. Q47.The number of significant figures in 5.0820 × 10^{2} is ​.
    Chemistry · Analytical Chemistry · Numerical
  44. Q48.The *d* spacing for the first-order X-ray (λ = 1.54 Å) diffraction event of metallic iron (*fcc*) at 2θ = 20.2° is ​ Å. (*round off to three decimal places*)
    Chemistry · Solid State · Numerical
  45. Q49.The volume fraction for an element in an *fcc* lattice is ​. (*round off to two decimal places*)
    Chemistry · Solid State · Numerical
  46. Q50.A steady current of 1.25 A is passed through an electrochemical cell for 1.5 h using a 12 V battery. The total charge, *Q*, drawn during this process is ​ Coulombs. (*round off to the nearest integer*)
    Chemistry · Electrochemistry · Numerical
  47. Q51.The specific rotation of optically pure (R)-1-phenylethylamine is +40 (neat, 20 °C). A synthetic sample of the same compound is shown to contain 4:1 mixture of (S)- and (R)-enantiomers. The specific rotation of the neat sample at 20 °C is ​…
    Chemistry · Basic Concepts and Stereochemistry · Numerical
  48. Q52.The number of β particles emitted in the nuclear reaction 92238​U→82206​Pb is ​.
    Chemistry · Analytical Chemistry · Numerical
  49. Q53.Iron is extracted from its ore via the reaction Fe2​O3​+3 CO→2 Fe+3 CO2​. The volume of CO (at STP) required to produce 1 kg of iron is ​ liters. *(round…
    Chemistry · Extractions of Metals · Numerical
  50. Q54.Total degeneracy (number of microstates) for a Ti^{3+} ion in spherical symmetry is ​.
    Chemistry · Atomic and Molecular Structure · Numerical
  51. Q55.A galvanic electrochemical cell made of Zn^{2+}/Zn and Cu^{2+}/Cu half-cells produces 1.10 V at 25 °C. The ratio of [Zn^{2+}] to [Cu^{2+}] is maintained at 1.0. The ΔG° for the reaction when 1.0 mol of Zn gets dissolved is ​…
    Chemistry · Electrochemistry · Numerical
  52. Q56.At constant volume, 1.0 kJ of heat is transferred to 2 moles of an ideal gas at 1 atm and 298 K. The final temperature of the ideal gas is ​ K. *(round off to one decimal place)* [Given: R = 8.314 J K^{-1} mol^{-1}]
    Chemistry · Chemical Thermodynamics · Numerical
  53. Q57.Two close lying bands in a UV spectrum occur at 274 nm and 269 nm. The magnitude of the energy gap between the two bands is ​ cm^{-1}. *(round off to the nearest integer)*
    Chemistry · Spectroscopy · Numerical
  54. Q58.The pH of an aqueous buffer prepared using CH_{3}COOH and CH_{3}COO^{-}Na^{+} is 4.80. The quantity [CH3​COOH][CH3​COO−]−[CH3​COOH]​ is ​. *(round off to…
    Chemistry · Chemical and Phase Equilibria · Numerical
  55. Q59.At constant temperature, 6.40 g of a substance dissolved in 78 g of benzene decreases the vapor pressure of benzene from 0.125 atm to 0.119 atm. The molar mass of the substance is ​ g mol^{-1}. *(round off to one…
    Chemistry · Chemical and Phase Equilibria · Numerical