2024

59 questions · IIT JAM

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2024

2024

59 questions · IIT JAM

Chemistry59 questions

Q1.The following dipeptide derivative is used as an artificial sweetener: The constituent α-amino acids of this dipeptide are Includes diagram
Chemistry · Natural Products Chemistry · MCQ
Q2.The suitable reagent combination for the following transformation is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q3.For the reaction $Me Me + KCN MeOH/H_{2} O Me Me CH_{2} CH_{2}$ if the concentration of KCN is increased four times, then the…
Chemistry · Chemical Kinetics · MCQ
Q4.Consider the wavefunction $ψ (x) = N [exp (ik x) + exp (- ik x)]$ . The complex conjugate $ψ^{*} (x)$ is [Given: $N$ is the normalization constant; $i = - 1$ ]
Chemistry · Atomic and Molecular Structure · MCQ
Q5.Wavelength of X-rays used in a diffraction experiment is 1.54 Å. X-rays are diffracted from a set of planes with an interplanar spacing of 1.54 Å. Then the angle θ (in degrees) corresponding to the first-order Bragg diffraction is
Chemistry · Solid State · MCQ
Q6.Identify the reaction for which, at equilibrium, a change in the volume of the closed reaction vessel at a constant temperature will not affect the extent of the reaction.
Chemistry · Chemical and Phase Equilibria · MCQ
Q7.Among $[Ti (H_{2} O)_{6}]^{3 +}$ , $[NiCl_{4}]^{2 -}$ , $[CrO_{4}]^{2 -}$ , and $[Mn (H_{2} O)_{6}]^{2 +}$ , the complex that exhibits the largest molar absorptivity in the visible region of the electronic…
Chemistry · Transition Metals · MCQ
Q8.[Co(NH₃)₅(SO₄)]Br and [Co(NH₃)₅Br]SO₄ are examples of
Chemistry · Transition Metals · MCQ
Q9.The pair of proteins having heme core is
Chemistry · Bioinorganic Chemistry · MCQ
Q10.The shape of $SCN^{-}$ is
Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
Q11.The major product formed in the following reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q12.The major product formed in the following reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q14.In the following reaction optically pure ester $X$ formed product that did not exhibit optical rotation ( $[α]_{D} = 0$ ) due to the formation of (Note: Ts = *para*-toluenesulfonyl; Ac = acetyl) Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q15.The major products **X** and **Y** in the following reactions respectively, are Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q16.The major product formed in the following reaction is Includes diagram
Chemistry · Aromatic and Heterocyclic Chemistry · MCQ
Q17.The acidity of the compounds shown below follows the order Includes diagram
Chemistry · Basic Concepts and Stereochemistry · MCQ
Q18.The major product formed in the following reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q19.The ratio of osmotic pressures of aqueous solutions of 0.01 M BaCl₂ to 0.005 M NaCl is [Given: Both compounds dissociate completely in water]
Chemistry · Chemical and Phase Equilibria · MCQ
Q20.In the cell reaction $P^{+} (a q) + Q (s) \to P (s) + Q^{+} (a q)$ the EMF of the cell, $E_{ce l l}$ is zero. The standard EMF of the cell, $E_{ce l l}^{o}$ is [Given: Activities of all solids are unity. Activity of $P^{+} (a q)$ is 2 M. Activity of…
Chemistry · Electrochemistry · MCQ
Q21.Consider photoelectric effect. The number of incident photons is the same for all frequencies. The plot that best describes the dependence of the number of photoelectrons (n) emitted as a function of the incident light frequency ( $ν$ ) is
Chemistry · Atomic and Molecular Structure · MCQ
Q22.If nitrogen and oxygen gases are at the same temperature, the correct statement according to the kinetic theory of gases is
Chemistry · Gaseous State · MCQ
Q23.A system undergoes one clockwise cycle from point X back to point X as shown in the figure below: The correct statement about this process is Includes diagram
Chemistry · Chemical Thermodynamics · MCQ
Q24.For the reaction shown below $\frac{1}{2} Mn_{2} (CO)_{10} + Na ⟶ Na [Mn (CO)_{5}] CH_{3} Cl - NaCl [CH_{3} Mn (CO)_{5}]$ P Q the oxidation…
Chemistry · Transition Metals · MCQ
Q25.The number and nature of $d - d$ transition(s) in the case of $Sc^{2 +}$ in an octahedral crystal field, respectively, are [Ignore spin-orbit coupling and Jahn-Teller distortion.]
Chemistry · Transition Metals · MCQ
Q26.The $d - d$ transitions in $[Mn (H_{2} O)_{6}]^{2 +}$ and $[Ti (H_{2} O)_{4}]^{3 +}$ , respectively, are [Ignore spin-orbit coupling and Jahn-Teller distortion.]
Chemistry · Transition Metals · MCQ
Q27.A pair of isosteric compounds is
Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
Q28.Zn–C bond polarity in the compounds below follows the order Includes diagram
Chemistry · Main Group Elements · MCQ
Q29.B₂ and C₂, respectively, are
Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
Q30.Mobility of ions $Li^{+}, Na^{+}, K^{+}, Ag^{+}$ in water at 298 K follows the order
Chemistry · Electrochemistry · MCQ
Q31.The suitable synthetic route(s) for the following transformation is/are Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
Q32.The compound(s) which on reaction with CH₃MgBr followed by treatment with aqueous NH₄Cl would produce 1-methyl-1-phenylethanol as the major product is/are
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
Q33.Among the following, the compound(s) which produce the same osazone as that obtained from D-glucose, when reacted with phenylhydrazine, is/are
Chemistry · Natural Products Chemistry · Multiple correct
Q34.Among the following, the chiral molecule(s) is/are
Chemistry · Basic Concepts and Stereochemistry · Multiple correct
Q35.The correct assumption(s) required to derive Langmuir adsorption isotherm is/are
Chemistry · Adsorption · Multiple correct
Q36.For one mole of an ideal gas, the correct statement(s) is/are [U = internal energy; V = volume; T = temperature; P = pressure]
Chemistry · Gaseous State · Multiple correct
Q37.Consider the exothermic chemical reaction O₂(g) + 2H₂(g) ⇌ 2H₂O(g) at equilibrium in a closed container. The correct statement(s) is/are
Chemistry · Chemical and Phase Equilibria · Multiple correct
Q38.Elements and their processes of extraction/purification are given. The correct pair(s) is/are
Chemistry · Extractions of Metals · Multiple correct
Q39.The correct statement(s) about the ligand substitution/exchange reaction is/are
Chemistry · Transition Metals · Multiple correct
Q40.The stretching frequency of CO in H₃B·CO is
Chemistry · Transition Metals · Multiple correct
Q41.For the following compound the number of signals expected in the $^{1}$ H NMR spectrum is . Includes diagram
Chemistry · Qualitative Organic Analysis · Numerical
Q42.Exhaustive hydrogenation of the following compound under Pd/C generates a saturated hydrocarbon as the product. The number of stereoisomers possible for this product is . Includes diagram
Chemistry · Basic Concepts and Stereochemistry · Numerical
Q43.For a zero-order reaction P → Q, the concentration of P becomes half of its initial concentration in 30 minutes after starting the reaction. The concentration of P becomes zero at minutes. (rounded off to the…
Chemistry · Chemical Kinetics · Numerical
Q44.The magnitude of energy difference between the energy levels $n = 3$ and $n = 2$ of a quantum particle of mass $m$ in a box of length $L$ is $\frac{X h ^{2}}{8 m L ^{2}}$ . Then $X =$ . (rounded off to the nearest integer)…
Chemistry · Atomic and Molecular Structure · Numerical
Q45.The function $exp (- 2 (x - 1)^{2})$ attains a maximum at $x =$ . (rounded off to the nearest integer)
Chemistry · Maxima and Minima · Numerical
Q46.0.1 M aqueous solution of a weak monobasic acid has pH 2.0. The $p K_{a}$ of the monobasic acid is . (rounded off to one decimal place)
Chemistry · Chemical and Phase Equilibria · Numerical
Q47.The enthalpy change for the reaction $C (g) + \frac{1}{2} O_{2} (g) \to CO (g)$ is kJ per mole of $CO (g)$ produced. (rounded off to one decimal place) [Given: $C (g) + O_{2} (g) \to CO_{2} (g), Δ H_{rxn} = - 393.5 kJ per mole of CO_{2} (g) produced CO_{2} (g) \to CO (g) + \frac{1}{2} O_{2} (g), Δ H_{rxn} = 283.0 kJ per mole of CO (g) produced]$ …
Chemistry · Chemical Thermodynamics · Numerical
Q48.The N–O bond order in [NO]⁻ is .
Chemistry · Chemical Bonding and Shapes of Molecules · Numerical
Q49.The bond length of CO is 113 pm and its dipole moment ( $μ$ ) is 0.1 D. The charge (in units of electronic charge) on carbon in the CO molecule including its sign is . (rounded off to three decimal places)…
Chemistry · Chemical Bonding and Shapes of Molecules · Numerical
Q50.The magnetic moment of O₃ molecule is Bohr magneton (B.M.). (rounded off to the nearest integer) Includes diagram
Chemistry · Chemical Bonding and Shapes of Molecules · Numerical
Q51.A reaction of 10.50 g of 1,2-diphenylethane-1,2-dione with conc. NaOH followed by aqueous acidic work-up furnished 8.55 g of a carboxylic acid. The yield of the carboxylic acid in this reaction is %. (rounded off…
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Numerical
Q52.The specific rotation of an optically pure compound is +75.3 (c 1.0 in CHCl₃) at 20 °C. A synthetic sample of the same compound showed a specific rotation of +66.3 (c 1.0 in CHCl₃) at 20 °C. The enantiomeric excess (ee) of the synthetic…
Chemistry · Basic Concepts and Stereochemistry · Numerical
Q53.A salt QCl of a certain metal Q is electrolyzed to its elements. 40 g of metal Q is formed at an electrode. The volume of Cl₂ formed at the other electrode at 1 atm pressure and 298 K is litres. (rounded off to…
Chemistry · Electrochemistry · Numerical
Q54.If 1 M of a dye in water transmits 50% of incident light at 400 nm, then 2 M of the dye in water transmits % of the incident light at 400 nm. (rounded off to the nearest integer) [Given: Both experiments are…
Chemistry · Spectroscopy · Numerical
Q55.A 1.0 L solution is prepared by dissolving 2.0 g of benzoic acid and 4.0 g of sodium benzoate in water. The pH of the resulting solution is . (rounded off to one decimal place)
Chemistry · Chemical and Phase Equilibria · Numerical
Q56.The total vapour pressure of an ideal binary liquid mixture of benzene and toluene is 0.3 bar. The vapour pressure of pure benzene is 0.5 bar and that of toluene is 0.2 bar. The mole fraction of benzene in this mixture is …
Chemistry · Chemical and Phase Equilibria · Numerical
Q57.The unit cell of a two-dimensional square lattice with lattice parameter a is indicated by the dashed lines as shown below: The percentage (%) area occupied by the grey circles (of radius r) inside the unit cell is … Includes diagram
Chemistry · Solid State · Numerical
Q58.In the oxidation of phosphorus with oxygen, 0.2 mol of P₄ produces g of P₄O₁₀. (rounded off to one decimal place) [Given: Atomic weight of P = 31; Atomic weight of O = 16]
Chemistry · Main Group Elements · Numerical
Q59.An element E has three isotopes: $_{14}^{28} E$ (abundance 92.21%, atomic mass: 27.977 a.m.u.), $_{14}^{29} E$ (abundance 4.70%, atomic mass: 28.976 a.m.u.), and $_{14}^{30} E$ (abundance 3.09%, atomic mass: 29.974…
Chemistry · Periodic Table · Numerical
Q60.The wavelength of the $γ$ -ray emitted in $_{56}^{137 m} Ba \to_{56}^{137} Ba + γ -ray (0.66 MeV)$ is Å. (rounded off to three decimal places) [Given: $h = 6.626 \times 1 0^{- 34} J s$ …
Chemistry · Analytical Chemistry · Numerical

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2024

59 questions · 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.

PYQ Library
IIT JAM
Papers
2024

2024

59 questions · IIT JAM

Chemistry59 questions

Q1.The following dipeptide derivative is used as an artificial sweetener: The constituent α-amino acids of this dipeptide are Includes diagram
Chemistry · Natural Products Chemistry · MCQ
Q2.The suitable reagent combination for the following transformation is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q3.For the reaction $Me Me + KCN MeOH/H_{2} O Me Me CH_{2} CH_{2}$ if the concentration of KCN is increased four times, then the…
Chemistry · Chemical Kinetics · MCQ
Q4.Consider the wavefunction $ψ (x) = N [exp (ik x) + exp (- ik x)]$ . The complex conjugate $ψ^{*} (x)$ is [Given: $N$ is the normalization constant; $i = - 1$ ]
Chemistry · Atomic and Molecular Structure · MCQ
Q5.Wavelength of X-rays used in a diffraction experiment is 1.54 Å. X-rays are diffracted from a set of planes with an interplanar spacing of 1.54 Å. Then the angle θ (in degrees) corresponding to the first-order Bragg diffraction is
Chemistry · Solid State · MCQ
Q6.Identify the reaction for which, at equilibrium, a change in the volume of the closed reaction vessel at a constant temperature will not affect the extent of the reaction.
Chemistry · Chemical and Phase Equilibria · MCQ
Q7.Among $[Ti (H_{2} O)_{6}]^{3 +}$ , $[NiCl_{4}]^{2 -}$ , $[CrO_{4}]^{2 -}$ , and $[Mn (H_{2} O)_{6}]^{2 +}$ , the complex that exhibits the largest molar absorptivity in the visible region of the electronic…
Chemistry · Transition Metals · MCQ
Q8.[Co(NH₃)₅(SO₄)]Br and [Co(NH₃)₅Br]SO₄ are examples of
Chemistry · Transition Metals · MCQ
Q9.The pair of proteins having heme core is
Chemistry · Bioinorganic Chemistry · MCQ
Q10.The shape of $SCN^{-}$ is
Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
Q11.The major product formed in the following reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q12.The major product formed in the following reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q14.In the following reaction optically pure ester $X$ formed product that did not exhibit optical rotation ( $[α]_{D} = 0$ ) due to the formation of (Note: Ts = *para*-toluenesulfonyl; Ac = acetyl) Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q15.The major products **X** and **Y** in the following reactions respectively, are Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q16.The major product formed in the following reaction is Includes diagram
Chemistry · Aromatic and Heterocyclic Chemistry · MCQ
Q17.The acidity of the compounds shown below follows the order Includes diagram
Chemistry · Basic Concepts and Stereochemistry · MCQ
Q18.The major product formed in the following reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q19.The ratio of osmotic pressures of aqueous solutions of 0.01 M BaCl₂ to 0.005 M NaCl is [Given: Both compounds dissociate completely in water]
Chemistry · Chemical and Phase Equilibria · MCQ
Q20.In the cell reaction $P^{+} (a q) + Q (s) \to P (s) + Q^{+} (a q)$ the EMF of the cell, $E_{ce l l}$ is zero. The standard EMF of the cell, $E_{ce l l}^{o}$ is [Given: Activities of all solids are unity. Activity of $P^{+} (a q)$ is 2 M. Activity of…
Chemistry · Electrochemistry · MCQ
Q21.Consider photoelectric effect. The number of incident photons is the same for all frequencies. The plot that best describes the dependence of the number of photoelectrons (n) emitted as a function of the incident light frequency ( $ν$ ) is
Chemistry · Atomic and Molecular Structure · MCQ
Q22.If nitrogen and oxygen gases are at the same temperature, the correct statement according to the kinetic theory of gases is
Chemistry · Gaseous State · MCQ
Q23.A system undergoes one clockwise cycle from point X back to point X as shown in the figure below: The correct statement about this process is Includes diagram
Chemistry · Chemical Thermodynamics · MCQ
Q24.For the reaction shown below $\frac{1}{2} Mn_{2} (CO)_{10} + Na ⟶ Na [Mn (CO)_{5}] CH_{3} Cl - NaCl [CH_{3} Mn (CO)_{5}]$ P Q the oxidation…
Chemistry · Transition Metals · MCQ
Q25.The number and nature of $d - d$ transition(s) in the case of $Sc^{2 +}$ in an octahedral crystal field, respectively, are [Ignore spin-orbit coupling and Jahn-Teller distortion.]
Chemistry · Transition Metals · MCQ
Q26.The $d - d$ transitions in $[Mn (H_{2} O)_{6}]^{2 +}$ and $[Ti (H_{2} O)_{4}]^{3 +}$ , respectively, are [Ignore spin-orbit coupling and Jahn-Teller distortion.]
Chemistry · Transition Metals · MCQ
Q27.A pair of isosteric compounds is
Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
Q28.Zn–C bond polarity in the compounds below follows the order Includes diagram
Chemistry · Main Group Elements · MCQ
Q29.B₂ and C₂, respectively, are
Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
Q30.Mobility of ions $Li^{+}, Na^{+}, K^{+}, Ag^{+}$ in water at 298 K follows the order
Chemistry · Electrochemistry · MCQ
Q31.The suitable synthetic route(s) for the following transformation is/are Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
Q32.The compound(s) which on reaction with CH₃MgBr followed by treatment with aqueous NH₄Cl would produce 1-methyl-1-phenylethanol as the major product is/are
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
Q33.Among the following, the compound(s) which produce the same osazone as that obtained from D-glucose, when reacted with phenylhydrazine, is/are
Chemistry · Natural Products Chemistry · Multiple correct
Q34.Among the following, the chiral molecule(s) is/are
Chemistry · Basic Concepts and Stereochemistry · Multiple correct
Q35.The correct assumption(s) required to derive Langmuir adsorption isotherm is/are
Chemistry · Adsorption · Multiple correct
Q36.For one mole of an ideal gas, the correct statement(s) is/are [U = internal energy; V = volume; T = temperature; P = pressure]
Chemistry · Gaseous State · Multiple correct
Q37.Consider the exothermic chemical reaction O₂(g) + 2H₂(g) ⇌ 2H₂O(g) at equilibrium in a closed container. The correct statement(s) is/are
Chemistry · Chemical and Phase Equilibria · Multiple correct
Q38.Elements and their processes of extraction/purification are given. The correct pair(s) is/are
Chemistry · Extractions of Metals · Multiple correct
Q39.The correct statement(s) about the ligand substitution/exchange reaction is/are
Chemistry · Transition Metals · Multiple correct
Q40.The stretching frequency of CO in H₃B·CO is
Chemistry · Transition Metals · Multiple correct
Q41.For the following compound the number of signals expected in the $^{1}$ H NMR spectrum is . Includes diagram
Chemistry · Qualitative Organic Analysis · Numerical
Q42.Exhaustive hydrogenation of the following compound under Pd/C generates a saturated hydrocarbon as the product. The number of stereoisomers possible for this product is . Includes diagram
Chemistry · Basic Concepts and Stereochemistry · Numerical
Q43.For a zero-order reaction P → Q, the concentration of P becomes half of its initial concentration in 30 minutes after starting the reaction. The concentration of P becomes zero at minutes. (rounded off to the…
Chemistry · Chemical Kinetics · Numerical
Q44.The magnitude of energy difference between the energy levels $n = 3$ and $n = 2$ of a quantum particle of mass $m$ in a box of length $L$ is $\frac{X h ^{2}}{8 m L ^{2}}$ . Then $X =$ . (rounded off to the nearest integer)…
Chemistry · Atomic and Molecular Structure · Numerical
Q45.The function $exp (- 2 (x - 1)^{2})$ attains a maximum at $x =$ . (rounded off to the nearest integer)
Chemistry · Maxima and Minima · Numerical
Q46.0.1 M aqueous solution of a weak monobasic acid has pH 2.0. The $p K_{a}$ of the monobasic acid is . (rounded off to one decimal place)
Chemistry · Chemical and Phase Equilibria · Numerical
Q47.The enthalpy change for the reaction $C (g) + \frac{1}{2} O_{2} (g) \to CO (g)$ is kJ per mole of $CO (g)$ produced. (rounded off to one decimal place) [Given: $C (g) + O_{2} (g) \to CO_{2} (g), Δ H_{rxn} = - 393.5 kJ per mole of CO_{2} (g) produced CO_{2} (g) \to CO (g) + \frac{1}{2} O_{2} (g), Δ H_{rxn} = 283.0 kJ per mole of CO (g) produced]$ …
Chemistry · Chemical Thermodynamics · Numerical
Q48.The N–O bond order in [NO]⁻ is .
Chemistry · Chemical Bonding and Shapes of Molecules · Numerical
Q49.The bond length of CO is 113 pm and its dipole moment ( $μ$ ) is 0.1 D. The charge (in units of electronic charge) on carbon in the CO molecule including its sign is . (rounded off to three decimal places)…
Chemistry · Chemical Bonding and Shapes of Molecules · Numerical
Q50.The magnetic moment of O₃ molecule is Bohr magneton (B.M.). (rounded off to the nearest integer) Includes diagram
Chemistry · Chemical Bonding and Shapes of Molecules · Numerical
Q51.A reaction of 10.50 g of 1,2-diphenylethane-1,2-dione with conc. NaOH followed by aqueous acidic work-up furnished 8.55 g of a carboxylic acid. The yield of the carboxylic acid in this reaction is %. (rounded off…
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Numerical
Q52.The specific rotation of an optically pure compound is +75.3 (c 1.0 in CHCl₃) at 20 °C. A synthetic sample of the same compound showed a specific rotation of +66.3 (c 1.0 in CHCl₃) at 20 °C. The enantiomeric excess (ee) of the synthetic…
Chemistry · Basic Concepts and Stereochemistry · Numerical
Q53.A salt QCl of a certain metal Q is electrolyzed to its elements. 40 g of metal Q is formed at an electrode. The volume of Cl₂ formed at the other electrode at 1 atm pressure and 298 K is litres. (rounded off to…
Chemistry · Electrochemistry · Numerical
Q54.If 1 M of a dye in water transmits 50% of incident light at 400 nm, then 2 M of the dye in water transmits % of the incident light at 400 nm. (rounded off to the nearest integer) [Given: Both experiments are…
Chemistry · Spectroscopy · Numerical
Q55.A 1.0 L solution is prepared by dissolving 2.0 g of benzoic acid and 4.0 g of sodium benzoate in water. The pH of the resulting solution is . (rounded off to one decimal place)
Chemistry · Chemical and Phase Equilibria · Numerical
Q56.The total vapour pressure of an ideal binary liquid mixture of benzene and toluene is 0.3 bar. The vapour pressure of pure benzene is 0.5 bar and that of toluene is 0.2 bar. The mole fraction of benzene in this mixture is …
Chemistry · Chemical and Phase Equilibria · Numerical
Q57.The unit cell of a two-dimensional square lattice with lattice parameter a is indicated by the dashed lines as shown below: The percentage (%) area occupied by the grey circles (of radius r) inside the unit cell is … Includes diagram
Chemistry · Solid State · Numerical
Q58.In the oxidation of phosphorus with oxygen, 0.2 mol of P₄ produces g of P₄O₁₀. (rounded off to one decimal place) [Given: Atomic weight of P = 31; Atomic weight of O = 16]
Chemistry · Main Group Elements · Numerical
Q59.An element E has three isotopes: $_{14}^{28} E$ (abundance 92.21%, atomic mass: 27.977 a.m.u.), $_{14}^{29} E$ (abundance 4.70%, atomic mass: 28.976 a.m.u.), and $_{14}^{30} E$ (abundance 3.09%, atomic mass: 29.974…
Chemistry · Periodic Table · Numerical
Q60.The wavelength of the $γ$ -ray emitted in $_{56}^{137 m} Ba \to_{56}^{137} Ba + γ -ray (0.66 MeV)$ is Å. (rounded off to three decimal places) [Given: $h = 6.626 \times 1 0^{- 34} J s$ …
Chemistry · Analytical Chemistry · Numerical