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Chemistry · 2023

59 questions from this IIT JAM paper

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IIT JAM
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2023
Chemistry

Chemistry · 2023

59 questions from this IIT JAM paper

Organic Reaction Mechanism and Synthetic Applications12 questions Liquid State2 questions Electrochemistry2 questions Atomic and Molecular Structure4 questions Bioinorganic Chemistry2 questions Main Group Elements2 questions Analytical Chemistry2 questions Aromatic and Heterocyclic Chemistry2 questions Basic Concepts and Stereochemistry4 questions Adsorption1 questions Chemical and Phase Equilibria3 questions Gaseous State1 questions Chemical Kinetics3 questions Solid State1 questions Transition Metals6 questions Chemical Bonding and Shapes of Molecules4 questions Qualitative Organic Analysis2 questions Chemical Thermodynamics3 questions Extractions of Metals1 questions Natural Products Chemistry1 questions Spectroscopy1 questions

Q1.The structure of Q in the following reaction scheme is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q2.The major product of the reaction is (i) $CH_{2} I_{2}$ Zn-Cu (ii) Li, NH3 (liq.) (iii) $H_{3} O^{+}$ Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q3.The rate of addition of 1-hexyl radical to the given molecules follows the order Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q4.The major product of the reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q5.The diagram that best describes the variation of viscosity (η) of water with temperature at 1 atm is
Chemistry · Liquid State · MCQ
Q6.The SI unit of the molar conductivity of an electrolyte solution is
Chemistry · Electrochemistry · MCQ
Q7.The system with the lowest zero-point energy when it is confined to a one-dimensional box of length $L$ is
Chemistry · Atomic and Molecular Structure · MCQ
Q8.The metal ion present in human *carbonic anhydrase* is
Chemistry · Bioinorganic Chemistry · MCQ
Q9.The oxoacid of sulfur that has $S - O_{2} - S$ bond is
Chemistry · Main Group Elements · MCQ
Q10.An alkaline (NaOH) solution of a compound produces a yellow colored solution on addition of NaBO₃. The compound is
Chemistry · Analytical Chemistry · MCQ
Q12.The major product in the following reaction is Includes diagram
Chemistry · Aromatic and Heterocyclic Chemistry · MCQ
Q13.The most stable conformation of Y and that of Z are Includes diagram
Chemistry · Basic Concepts and Stereochemistry · MCQ
Q14.The major product **Y** in the following reaction scheme is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q15.The major product of the reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q16.The major product of the reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q17.Adsorption of a gas on a solid surface follows the Langmuir isotherm. If $k_{a} / k_{d} = 1.0$ bar $^{- 1}$ , the fraction of adsorption sites occupied by the gas at equilibrium under 2.0 bar pressure of the gas at 25 °C is ( $k_{a}$ and $k_{d}$ are…
Chemistry · Adsorption · MCQ
Q18.The vapor pressure of a dilute solution of a non-volatile solute and the vapor pressure of the pure solvent at the same temperature are $P$ and $P^{*}$ , respectively. $\frac{P ^{*} - P}{P ^{*}} is equal to$ (Assume that the vapor phase…
Chemistry · Chemical and Phase Equilibria · MCQ
Q19.The volume of water (in mL) required to be added to a 100 mL solution (aq. 0.1 M) of a weak acid (HA) at 25 °C to double its degree of dissociation is [Given: $K_{a}$ of HA at 25 °C = $1.8 \times 1 0^{- 5}$ ]
Chemistry · Chemical and Phase Equilibria · MCQ
Q20.The following diagram is obtained in a pH-metric titration of a weak dibasic acid (H₂A) with a strong base. The point that best represents [HA⁻] = [A⁻²] is Includes diagram
Chemistry · Chemical and Phase Equilibria · MCQ
Q21.Equal number of gas molecules **A** (mass $m$ and radius $r$ ) and **B** (mass $2 m$ and radius $2 r$ ) are placed in two separate containers of equal volume. At a given temperature, the ratio of the collision frequency of **B** to that of…
Chemistry · Gaseous State · MCQ
Q22.For the given elementary reactions, the steady-state concentration of X is $2 P k_{1} X k_{4} ⇌ k_{2} Q + R ↓ S$
Chemistry · Chemical Kinetics · MCQ
Q23.The separation (in nm) of {134} planes of an orthorhombic unit cell (with cell parameters a = 0.5 nm, b = 0.6 nm, and c = 0.8 nm) is
Chemistry · Solid State · MCQ
Q24.The transition metal (M) complex that can have all isomers (geometric, linkage, and ionization) is
Chemistry · Transition Metals · MCQ
Q25.The geometry of [VO(acac) $_{2}$ ] is
Chemistry · Transition Metals · MCQ
Q26.The products **X** and **Y** in the following reaction sequence, respectively, are $BCl_{3} NH_{4} Cl in C_{6} H_{5} Cl 15 0^{\circ} C X NaBH_{4} NaBH_{4} Y$
Chemistry · Main Group Elements · MCQ
Q27.The correct order of the energy of the d orbitals of a square planar complex is
Chemistry · Transition Metals · MCQ
Q28.X and Y in the following reactions, respectively, are $EtOH + 2 H_{2} SO_{4} \to X + H_{3} O^{+} + HSO_{4}^{-} HNO_{3} + 2 H_{2} SO_{4} \to Y + H_{3} O^{+} + 2 HSO_{4}^{-}$ …
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q29.The correct order of energy levels of the molecular orbitals of $N_{2}$ is
Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
Q30.Free heme in aqueous solution when exposed to dioxygen is finally converted to (circle around iron in the given choices represents the protoporphyrin IX)
Chemistry · Bioinorganic Chemistry · MCQ
Q31.Correct statement(s) about Q and R is/are Includes diagram
Chemistry · Qualitative Organic Analysis · Multiple correct
Q32.The correct statement(s) is/are
Chemistry · Basic Concepts and Stereochemistry · Multiple correct
Q33.The reaction(s) that yield(s) Ph-CH2-CH2-CO2Me as the major product is/are
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
Q34.The correct option(s) of the reagents required for the following reaction is/are Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
Q35.The reaction(s) that yield(s) 1-naphthol as the major product is/are
Chemistry · Aromatic and Heterocyclic Chemistry · Multiple correct
Q36.The correct relation(s) for an ideal gas in a closed system is/are
Chemistry · Chemical Thermodynamics · Multiple correct
Q37.The molecule(s) that follow(s) $I_{a} < I_{b} = I_{c}$ ( $I_{a}$ , $I_{b}$ , and $I_{c}$ are the principal moments of inertia) is/are
Chemistry · Atomic and Molecular Structure · Multiple correct
Q38.The role(s) of fluorspar in the electrolytic reduction of $Al_{2} O_{3}$ is/are to
Chemistry · Extractions of Metals · Multiple correct
Q39.The correct statement(s) about the complexes **I** (K₃[CoF₆]) and **II** (K₃[RhF₆]) is/are
Chemistry · Transition Metals · Multiple correct
Q40.The diatomic molecule(s) that has/have bond order of one is/are
Chemistry · Chemical Bonding and Shapes of Molecules · Multiple correct
Q41.The molecular weight of the major product of the reaction is (in integer). (i) Br₂ (excess), CH₃CO₂H (ii) Sn/HCl (iii) NaNO₂/HCl (excess), 0 °C (iv) CuBr (excess) [Given: atomic weight of H = 1, C = 12, N = 14,… Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Numerical
Q42.A 0.06 g/mL solution of (S)-1-phenylethanol placed in a 5 cm long polarimeter tube shows an optical rotation of 1.2°. The specific rotation is °. (round off to the nearest integer)
Chemistry · Basic Concepts and Stereochemistry · Numerical
Q43.The isoelectric point of glutamic acid is (round off to two decimal places) Includes diagram
Chemistry · Natural Products Chemistry · Numerical
Q44.Consider the following reaction: $2 C_{6} H_{6} + 15 O_{2} \to 12 CO_{2} + 6 H_{2} O Δ_{r} H_{298}^{0} = - 3120 kJ mol^{- 1} .$ A closed…
Chemistry · Chemical Thermodynamics · Numerical
Q45.For the elementary reaction $C \leftarrow k_{2} A \to k_{1} B, k_{1} = 2 k_{2}$ . At time $t = 0$ , $[A] = A_{0}$ and $[B] = [C] = 0$ . At a later time $t$ ,…
Chemistry · Chemical Kinetics · Numerical
Q46.The highest possible energy of a photon in the emission spectrum of hydrogen atom is eV. [Given: Rydberg constant = 13.61 eV] (round off to two decimal places)
Chemistry · Atomic and Molecular Structure · Numerical
Q47.The standard reduction potential ( $E^{0}$ ) of Fe $^{3 +} \to$ Fe is V. [Given: Fe $^{3 +} \to$ Fe $^{2 +} E^{0}$ = 0.77 V and Fe $^{2 +} \to$ Fe $E^{0}$ = -0.44 V] (round off to three decimal places)
Chemistry · Electrochemistry · Numerical
Q48.The number of valence electrons in Na $_{2}$ [Fe(CO) $_{4}$ ] (the Colman's reagent) is .
Chemistry · Transition Metals · Numerical
Q49.In the Born-Haber cycle, the heat of formation of CuCl is kJ/mol. [Given: Heat of atomization of Cu = +338 kJ/mol, Ionization energy of Cu = +746 kJ/mol, Heat of atomization of Cl $_{2}$ = +121 kJ/mol, Electron…
Chemistry · Chemical Bonding and Shapes of Molecules · Numerical
Q50.The spin-only magnetic moment of B $_{2}$ molecule is $μ_{B}$ . (round off to two decimal places)
Chemistry · Chemical Bonding and Shapes of Molecules · Numerical
Q51.The sum of the total number of stereoisomers (including enantiomers) present in the following molecules is . Includes diagram
Chemistry · Basic Concepts and Stereochemistry · Numerical
Q52.The number of singlets observed in the $^{1}$ H NMR spectrum of P is .
Chemistry · Qualitative Organic Analysis · Numerical
Q53.When a glass capillary tube is dipped in water, a 1.0 cm rise in the water level is observed at 18 °C. The internal radius of the capillary is cm.
Chemistry · Liquid State · Numerical
Q54.The volume of 2.0 mol of an ideal gas is reduced to half isothermally at 300 K in a closed system. The value of ΔG is kJ.
Chemistry · Chemical Thermodynamics · Numerical
Q55.The harmonic vibrational frequency of a diatomic molecule is 2000 cm⁻¹. Its zero-point energy is eV.
Chemistry · Spectroscopy · Numerical
Q56.An elementary reaction 2A → P follows a second order rate law with rate constant 2.5 × 10⁻³ dm³ mol⁻¹ s⁻¹. The time required for the concentration of A to change from 0.4 mol dm⁻³ to 0.2 mol dm⁻³ is s.
Chemistry · Chemical Kinetics · Numerical
Q57.The following diagram shows the kinetic energy of the ejected photoelectrons against the energy of incident radiation for two metal surfaces M₁ and M₂. If the energy of the incident radiation on M₁ is equal to the work function of M₂, the…
Chemistry · Atomic and Molecular Structure · Numerical
Q58.The spin-only magnetic moment of [Fe(acac)₃] is μB.
Chemistry · Transition Metals · Numerical
Q59.The amount of ethane produced in the following reaction is kg. $C_{2} H_{4} (2 kg) + H_{2} (2 kg) Wilkinson’s Catalyst C_{2} H_{6} (90% catalytic conversion)$ …
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Numerical
Q60.In a gravimetric estimation of Al, a sample of $0.1000 g AlCl_{3}$ is precipitated with 8-hydroxyquinoline. The weight of the precipitate is g.
Chemistry · Analytical Chemistry · Numerical