2015

59 questions · IIT JAM

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2015

2015

59 questions · IIT JAM

Chemistry59 questions

Transition MetalsChemistry · 8 questions Main Group ElementsChemistry · 2 questions Bioinorganic ChemistryChemistry · 1 questions Organic Reaction Mechanism and Synthetic ApplicationsChemistry · 10 questions Basic Concepts and StereochemistryChemistry · 1 questions Qualitative Organic AnalysisChemistry · 5 questions Vectors and MatricesChemistry · 1 questions Gaseous StateChemistry · 3 questions Analytical ChemistryChemistry · 4 questions Chemical Bonding and Shapes of MoleculesChemistry · 2 questions Periodic TableChemistry · 2 questions Aromatic and Heterocyclic ChemistryChemistry · 3 questions Atomic and Molecular StructureChemistry · 2 questions Chemical and Phase EquilibriaChemistry · 3 questions Chemical ThermodynamicsChemistry · 3 questions Chemical KineticsChemistry · 2 questions ElectrochemistryChemistry · 2 questions SpectroscopyChemistry · 2 questions Solid StateChemistry · 1 questions Natural Products ChemistryChemistry · 1 questions AdsorptionChemistry · 1 questions

Q1.The first row transition metal complexes having tetrahedral geometry are high-spin due to
Chemistry · Transition Metals · MCQ
Q2.The species responsible for the superacidity of SbF $_{5}$ -HSO $_{3}$ F system is
Chemistry · Main Group Elements · MCQ
Q3.A filter paper moistened with cadmium acetate solution turns yellow upon exposure to H $_{2}$ S. The transition responsible for the yellow colour is
Chemistry · Transition Metals · MCQ
Q4.Low-spin iron(III) center is present in
Chemistry · Bioinorganic Chemistry · MCQ
Q5.The major product formed in the following reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q6.The structure of (2S,3R)-2-amino-3-hydroxy butanoic acid is
Chemistry · Basic Concepts and Stereochemistry · MCQ
Q7.The ene-yne that produces a chiral compound upon treatment with Lindlar’s catalyst is
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q8.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 is
Chemistry · Qualitative Organic Analysis · MCQ
Q9.Which one of the following is an identity matrix?
Chemistry · Vectors and Matrices · MCQ
Q10.The intermolecular van der Waals potential is inversely proportional to $r^{6}$ . The corresponding force is proportional to
Chemistry · Gaseous State · MCQ
Q11.The normal spinel among the following mixed metal-oxides is
Chemistry · Transition Metals · MCQ
Q12.The ground state term for a free ion with 3d $^{7}$ configuration is
Chemistry · Transition Metals · MCQ
Q13.The reagent ‘oxine’ commonly used in analytical chemistry is
Chemistry · Analytical Chemistry · MCQ
Q14.The species having trigonal pyramidal shape is
Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
Q15.The correct statement about ionization potential (IP) is
Chemistry · Periodic Table · MCQ
Q17.The set of products formed in the following reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q18.The correct set of reagents required for the following transformation is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q19.The correct order of the pKa values for the conjugate acids of heterocyclic compounds given below (I, II, III, IV) is
Chemistry · Aromatic and Heterocyclic Chemistry · MCQ
Q20.The correct order of the $^{1}$ H NMR chemical shift values ( $δ$ ) for the indicated hydrogens (in bold) in the following compounds is Includes diagram
Chemistry · Qualitative Organic Analysis · MCQ
Q21.Which of the following statements are correct for S $_{N}$ Ar reaction? (i) Follows second order kinetics (ii) $K_{H} / K_{D} > 1$ (iii) Involves carbanion-type intermediate (iv) Involves two transition states
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q22.According to the equipartition principle, the predicted high temperature limiting value of the molar heat capacity at constant volume for C $_{2}$ H $_{2}$ is
Chemistry · Atomic and Molecular Structure · MCQ
Q23.The major product formed in the following reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q24.At 25 °C, the solubility product ( $K_{s p}$ ) of CaF $_{2}$ in water is $3.2 \times 1 0^{- 11}$ . The solubility (in mole per kg of water) of the salt at the same temperature (ignore ion pairing) is
Chemistry · Chemical and Phase Equilibria · MCQ
Q25.For an isothermal free expansion of an ideal gas into vacuum, which one of the following set of values is correct?
Chemistry · Chemical Thermodynamics · MCQ
Q26.The kinetics of the reaction 2N $_{2}$ O $_{5}$ → 4NO $_{2}$ + O $_{2}$ in liquid bromine medium was measured independently for three different initial concentrations of N $_{2}$ O $_{5}$ : 0.11, 0.07 and 0.05 mol L $^{- 1}$ . The half-life of the…
Chemistry · Chemical Kinetics · MCQ
Q27.The concentration of K $^{+}$ ion inside a biological cell is 20 times higher than outside. The magnitude of potential difference between the two sides is [Given: 2.303 RT/F = 59 mV]
Chemistry · Electrochemistry · MCQ
Q28.The correct order of the fundamental vibrational frequencies of the following diatomic molecules is
Chemistry · Spectroscopy · MCQ
Q29.Identify the correct reagents required for the following transformation Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q30.The complex that is expected to show orbital contribution to the overall magnetic moment is
Chemistry · Transition Metals · MCQ
Q31.The common feature(s) of Rb $^{+}$ , Kr and Br $^{-}$ is/are that they
Chemistry · Periodic Table · Multiple correct
Q32.The characteristics of the blue solution of sodium in liquid ammonia is/are
Chemistry · Main Group Elements · Multiple correct
Q33.Which of the following statement(s) is/are true about the transition metal-alkene complexes?
Chemistry · Transition Metals · Multiple correct
Q34.Which of the following statement(s) is/are true about the reaction given below? Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
Q35.The reaction(s) which give(s) phenol is/are
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
Q36.Which of the following species is/are aromatic in nature?
Chemistry · Aromatic and Heterocyclic Chemistry · Multiple correct
Q37.Which of the following compound(s) show(s) only two signals in $^{1}$ H NMR and a strong IR band at ~1690 cm $^{- 1}$ ?
Chemistry · Qualitative Organic Analysis · Multiple correct
Q38.If $\overset{x}{^} = x \times$ and $\overset{p}{^}_{x} = \frac{h}{2 π i} \frac{d}{d x}$ , then the value(s) of $\overset{p}{^}_{x} \overset{x}{^} - \overset{x}{^} \overset{p}{^}_{x}$ is/are
Chemistry · Atomic and Molecular Structure · Multiple correct
Q39.At what angle(s) of incidence, X-rays of wavelength 5.0 Å will produce diffracted beam from the (110) planes in a simple cubic lattice with $a = 10$ Å?
Chemistry · Solid State · Multiple correct
Q40.Which of the following thermodynamic relation(s) is/are correct?
Chemistry · Chemical Thermodynamics · Multiple correct
Q41.Given that the crystal field stabilization energy for $[Co (H_{2} O)_{6}]^{2 +}$ is $7360 c m^{- 1}$ , the calculated value of $Δ_{0}$ in kJ mol $^{- 1}$ is
Chemistry · Transition Metals · Numerical
Q42.The amount (in grams) of potassium dichromate ( $MW = 294$ ) present in $75 mL$ of $0.16 M$ aqueous solution is
Chemistry · Analytical Chemistry · Numerical
Q43.Given that the expected spin-only magnetic moment for $(Et_{4} N)_{2} [NiCl_{4}]$ is $2.83 μ_{B}$ , the total number of unpaired electrons in this complex is
Chemistry · Transition Metals · Numerical
Q44.The pK $_{a}$ values of lysine are 2.18, 8.95 and 10.79. The isoelectric point of lysine is
Chemistry · Natural Products Chemistry · Numerical
Q45.The amount (in grams) of NaOH ( $MW = 40$ ) required for complete neutralization of one mole of the following compound is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Numerical
Q46.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,…
Chemistry · Qualitative Organic Analysis · Numerical
Q47.In the gas phase, the ratio of excluded volume to molecular volume for a spherical molecule is
Chemistry · Gaseous State · Numerical
Q48.The pK $_{a}$ values of H $_{3}$ PO $_{4}$ are 2.12, 7.21 and 12.67. The pH of a phosphate buffer containing 0.2 M NaH $_{2}$ PO $_{4}$ and 0.1 M Na $_{2}$ HPO $_{4}$ is
Chemistry · Chemical and Phase Equilibria · Numerical
Q49.For the reaction, 2SO $_{2}$ + O $_{2}$ ⇌ 2SO $_{3}$ , the equilibrium constant K $_{p}$ = 5.0 at 207 °C. If the partial pressures of SO $_{2}$ , O $_{2}$ and SO $_{3}$ are $1.0 \times 1 0^{- 3}$ , 0.20 and $1.0 \times 1 0^{- 4}$ , respectively, then the Gibbs…
Chemistry · Chemical and Phase Equilibria · Numerical
Q50.Two moles of an ideal gas is expanded isothermally and reversibly from 5 to 1 bar at 298 K. The change in the entropy (in J K $^{- 1}$ ) of the system is
Chemistry · Chemical Thermodynamics · Numerical
Q51.The ionic radii of Cs $^{+}$ and Cl $^{-}$ ions are 181 and 167 pm, respectively. The Born exponents for the He, Ne, Ar, Kr and Xe configurations are 5, 7, 9, 10 and 12, respectively. If the value of $\frac{A N e ^{2}}{4 π ε _{0}}$ is $2.45 \times 1 0^{- 4}$ …
Chemistry · Chemical Bonding and Shapes of Molecules · Numerical
Q52.A $2.5 \times 1 0^{- 4}$ M solution of a complex exhibits an absorption maximum at 625 nm with an absorbance of 0.90 when measured in a cuvette with a path length of 1.5 cm. The absorbance of $1.5 \times 1 0^{- 3}$ M solution of the same…
Chemistry · Analytical Chemistry · Numerical
Q53.A wood specimen containing $^{14}$ C taken from an ancient palace showed 24 counts in 3 minutes per gram of carbon in a detector. However, a fresh wood showed 52 counts in 2 minutes per gram of carbon. Assuming no background signal in the…
Chemistry · Analytical Chemistry · Numerical
Q54.The magnetic field (in Tesla) required for flipping a $^{1}$ H nucleus in an NMR spectrometer operating at 400 MHz is [Given: $γ = 2.67 \times 1 0^{8}$ T $^{- 1}$ s $^{- 1}$ , $π = 3.14$ ]
Chemistry · Spectroscopy · Numerical
Q55.The total number of compounds (shown below) that form phenylhydrazone derivatives under acidic conditions is Includes diagram
Chemistry · Qualitative Organic Analysis · Numerical
Q56.The number of possible monoalkylated products formed in the Friedel-Crafts reaction of anisole with 2-chloro-3-methylbutane in the presence of anhydrous AlCl $_{3}$ at 50 °C is
Chemistry · Aromatic and Heterocyclic Chemistry · Numerical
Q57.For a reaction, the rate constant at 25 °C is doubled when the temperature is raised to 45 °C. The activation energy (in kJ mol $^{- 1}$ ) of the reaction is [Given: ln2 = 0.693]
Chemistry · Chemical Kinetics · Numerical
Q58.The standard reduction potentials of the Fe $^{3 +}$ /Fe $^{2 +}$ and Fe $^{2 +}$ /Fe couples are 0.77 and –0.44 V, respectively. The standard reduction potential (in V) for the Fe $^{3 +}$ /Fe couple is
Chemistry · Electrochemistry · Numerical
Q59.When a perfect monolayer of stearic acid is formed at the air-water interface, each molecule of stearic acid (MW = 284, density = 0.94 g cm $^{- 3}$ ) occupies an area of 20 Å $^{2}$ . The length (in Å) of the molecule is …
Chemistry · Adsorption · Numerical
Q60.In an ideal monoatomic gas, the speed of sound is given by $\frac{5 R T}{3 M}$ . If the speed of sound in argon at 25 °C is 1245 km h $^{- 1}$ , the root mean square velocity in m s $^{- 1}$ is
Chemistry · Gaseous State · Numerical

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2015

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
2015

2015

59 questions · IIT JAM

Chemistry59 questions

Transition MetalsChemistry · 8 questions Main Group ElementsChemistry · 2 questions Bioinorganic ChemistryChemistry · 1 questions Organic Reaction Mechanism and Synthetic ApplicationsChemistry · 10 questions Basic Concepts and StereochemistryChemistry · 1 questions Qualitative Organic AnalysisChemistry · 5 questions Vectors and MatricesChemistry · 1 questions Gaseous StateChemistry · 3 questions Analytical ChemistryChemistry · 4 questions Chemical Bonding and Shapes of MoleculesChemistry · 2 questions Periodic TableChemistry · 2 questions Aromatic and Heterocyclic ChemistryChemistry · 3 questions Atomic and Molecular StructureChemistry · 2 questions Chemical and Phase EquilibriaChemistry · 3 questions Chemical ThermodynamicsChemistry · 3 questions Chemical KineticsChemistry · 2 questions ElectrochemistryChemistry · 2 questions SpectroscopyChemistry · 2 questions Solid StateChemistry · 1 questions Natural Products ChemistryChemistry · 1 questions AdsorptionChemistry · 1 questions

Q1.The first row transition metal complexes having tetrahedral geometry are high-spin due to
Chemistry · Transition Metals · MCQ
Q2.The species responsible for the superacidity of SbF $_{5}$ -HSO $_{3}$ F system is
Chemistry · Main Group Elements · MCQ
Q3.A filter paper moistened with cadmium acetate solution turns yellow upon exposure to H $_{2}$ S. The transition responsible for the yellow colour is
Chemistry · Transition Metals · MCQ
Q4.Low-spin iron(III) center is present in
Chemistry · Bioinorganic Chemistry · MCQ
Q5.The major product formed in the following reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q6.The structure of (2S,3R)-2-amino-3-hydroxy butanoic acid is
Chemistry · Basic Concepts and Stereochemistry · MCQ
Q7.The ene-yne that produces a chiral compound upon treatment with Lindlar’s catalyst is
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q8.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 is
Chemistry · Qualitative Organic Analysis · MCQ
Q9.Which one of the following is an identity matrix?
Chemistry · Vectors and Matrices · MCQ
Q10.The intermolecular van der Waals potential is inversely proportional to $r^{6}$ . The corresponding force is proportional to
Chemistry · Gaseous State · MCQ
Q11.The normal spinel among the following mixed metal-oxides is
Chemistry · Transition Metals · MCQ
Q12.The ground state term for a free ion with 3d $^{7}$ configuration is
Chemistry · Transition Metals · MCQ
Q13.The reagent ‘oxine’ commonly used in analytical chemistry is
Chemistry · Analytical Chemistry · MCQ
Q14.The species having trigonal pyramidal shape is
Chemistry · Chemical Bonding and Shapes of Molecules · MCQ
Q15.The correct statement about ionization potential (IP) is
Chemistry · Periodic Table · MCQ
Q17.The set of products formed in the following reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q18.The correct set of reagents required for the following transformation is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q19.The correct order of the pKa values for the conjugate acids of heterocyclic compounds given below (I, II, III, IV) is
Chemistry · Aromatic and Heterocyclic Chemistry · MCQ
Q20.The correct order of the $^{1}$ H NMR chemical shift values ( $δ$ ) for the indicated hydrogens (in bold) in the following compounds is Includes diagram
Chemistry · Qualitative Organic Analysis · MCQ
Q21.Which of the following statements are correct for S $_{N}$ Ar reaction? (i) Follows second order kinetics (ii) $K_{H} / K_{D} > 1$ (iii) Involves carbanion-type intermediate (iv) Involves two transition states
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q22.According to the equipartition principle, the predicted high temperature limiting value of the molar heat capacity at constant volume for C $_{2}$ H $_{2}$ is
Chemistry · Atomic and Molecular Structure · MCQ
Q23.The major product formed in the following reaction is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q24.At 25 °C, the solubility product ( $K_{s p}$ ) of CaF $_{2}$ in water is $3.2 \times 1 0^{- 11}$ . The solubility (in mole per kg of water) of the salt at the same temperature (ignore ion pairing) is
Chemistry · Chemical and Phase Equilibria · MCQ
Q25.For an isothermal free expansion of an ideal gas into vacuum, which one of the following set of values is correct?
Chemistry · Chemical Thermodynamics · MCQ
Q26.The kinetics of the reaction 2N $_{2}$ O $_{5}$ → 4NO $_{2}$ + O $_{2}$ in liquid bromine medium was measured independently for three different initial concentrations of N $_{2}$ O $_{5}$ : 0.11, 0.07 and 0.05 mol L $^{- 1}$ . The half-life of the…
Chemistry · Chemical Kinetics · MCQ
Q27.The concentration of K $^{+}$ ion inside a biological cell is 20 times higher than outside. The magnitude of potential difference between the two sides is [Given: 2.303 RT/F = 59 mV]
Chemistry · Electrochemistry · MCQ
Q28.The correct order of the fundamental vibrational frequencies of the following diatomic molecules is
Chemistry · Spectroscopy · MCQ
Q29.Identify the correct reagents required for the following transformation Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · MCQ
Q30.The complex that is expected to show orbital contribution to the overall magnetic moment is
Chemistry · Transition Metals · MCQ
Q31.The common feature(s) of Rb $^{+}$ , Kr and Br $^{-}$ is/are that they
Chemistry · Periodic Table · Multiple correct
Q32.The characteristics of the blue solution of sodium in liquid ammonia is/are
Chemistry · Main Group Elements · Multiple correct
Q33.Which of the following statement(s) is/are true about the transition metal-alkene complexes?
Chemistry · Transition Metals · Multiple correct
Q34.Which of the following statement(s) is/are true about the reaction given below? Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
Q35.The reaction(s) which give(s) phenol is/are
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Multiple correct
Q36.Which of the following species is/are aromatic in nature?
Chemistry · Aromatic and Heterocyclic Chemistry · Multiple correct
Q37.Which of the following compound(s) show(s) only two signals in $^{1}$ H NMR and a strong IR band at ~1690 cm $^{- 1}$ ?
Chemistry · Qualitative Organic Analysis · Multiple correct
Q38.If $\overset{x}{^} = x \times$ and $\overset{p}{^}_{x} = \frac{h}{2 π i} \frac{d}{d x}$ , then the value(s) of $\overset{p}{^}_{x} \overset{x}{^} - \overset{x}{^} \overset{p}{^}_{x}$ is/are
Chemistry · Atomic and Molecular Structure · Multiple correct
Q39.At what angle(s) of incidence, X-rays of wavelength 5.0 Å will produce diffracted beam from the (110) planes in a simple cubic lattice with $a = 10$ Å?
Chemistry · Solid State · Multiple correct
Q40.Which of the following thermodynamic relation(s) is/are correct?
Chemistry · Chemical Thermodynamics · Multiple correct
Q41.Given that the crystal field stabilization energy for $[Co (H_{2} O)_{6}]^{2 +}$ is $7360 c m^{- 1}$ , the calculated value of $Δ_{0}$ in kJ mol $^{- 1}$ is
Chemistry · Transition Metals · Numerical
Q42.The amount (in grams) of potassium dichromate ( $MW = 294$ ) present in $75 mL$ of $0.16 M$ aqueous solution is
Chemistry · Analytical Chemistry · Numerical
Q43.Given that the expected spin-only magnetic moment for $(Et_{4} N)_{2} [NiCl_{4}]$ is $2.83 μ_{B}$ , the total number of unpaired electrons in this complex is
Chemistry · Transition Metals · Numerical
Q44.The pK $_{a}$ values of lysine are 2.18, 8.95 and 10.79. The isoelectric point of lysine is
Chemistry · Natural Products Chemistry · Numerical
Q45.The amount (in grams) of NaOH ( $MW = 40$ ) required for complete neutralization of one mole of the following compound is Includes diagram
Chemistry · Organic Reaction Mechanism and Synthetic Applications · Numerical
Q46.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,…
Chemistry · Qualitative Organic Analysis · Numerical
Q47.In the gas phase, the ratio of excluded volume to molecular volume for a spherical molecule is
Chemistry · Gaseous State · Numerical
Q48.The pK $_{a}$ values of H $_{3}$ PO $_{4}$ are 2.12, 7.21 and 12.67. The pH of a phosphate buffer containing 0.2 M NaH $_{2}$ PO $_{4}$ and 0.1 M Na $_{2}$ HPO $_{4}$ is
Chemistry · Chemical and Phase Equilibria · Numerical
Q49.For the reaction, 2SO $_{2}$ + O $_{2}$ ⇌ 2SO $_{3}$ , the equilibrium constant K $_{p}$ = 5.0 at 207 °C. If the partial pressures of SO $_{2}$ , O $_{2}$ and SO $_{3}$ are $1.0 \times 1 0^{- 3}$ , 0.20 and $1.0 \times 1 0^{- 4}$ , respectively, then the Gibbs…
Chemistry · Chemical and Phase Equilibria · Numerical
Q50.Two moles of an ideal gas is expanded isothermally and reversibly from 5 to 1 bar at 298 K. The change in the entropy (in J K $^{- 1}$ ) of the system is
Chemistry · Chemical Thermodynamics · Numerical
Q51.The ionic radii of Cs $^{+}$ and Cl $^{-}$ ions are 181 and 167 pm, respectively. The Born exponents for the He, Ne, Ar, Kr and Xe configurations are 5, 7, 9, 10 and 12, respectively. If the value of $\frac{A N e ^{2}}{4 π ε _{0}}$ is $2.45 \times 1 0^{- 4}$ …
Chemistry · Chemical Bonding and Shapes of Molecules · Numerical
Q52.A $2.5 \times 1 0^{- 4}$ M solution of a complex exhibits an absorption maximum at 625 nm with an absorbance of 0.90 when measured in a cuvette with a path length of 1.5 cm. The absorbance of $1.5 \times 1 0^{- 3}$ M solution of the same…
Chemistry · Analytical Chemistry · Numerical
Q53.A wood specimen containing $^{14}$ C taken from an ancient palace showed 24 counts in 3 minutes per gram of carbon in a detector. However, a fresh wood showed 52 counts in 2 minutes per gram of carbon. Assuming no background signal in the…
Chemistry · Analytical Chemistry · Numerical
Q54.The magnetic field (in Tesla) required for flipping a $^{1}$ H nucleus in an NMR spectrometer operating at 400 MHz is [Given: $γ = 2.67 \times 1 0^{8}$ T $^{- 1}$ s $^{- 1}$ , $π = 3.14$ ]
Chemistry · Spectroscopy · Numerical
Q55.The total number of compounds (shown below) that form phenylhydrazone derivatives under acidic conditions is Includes diagram
Chemistry · Qualitative Organic Analysis · Numerical
Q56.The number of possible monoalkylated products formed in the Friedel-Crafts reaction of anisole with 2-chloro-3-methylbutane in the presence of anhydrous AlCl $_{3}$ at 50 °C is
Chemistry · Aromatic and Heterocyclic Chemistry · Numerical
Q57.For a reaction, the rate constant at 25 °C is doubled when the temperature is raised to 45 °C. The activation energy (in kJ mol $^{- 1}$ ) of the reaction is [Given: ln2 = 0.693]
Chemistry · Chemical Kinetics · Numerical
Q58.The standard reduction potentials of the Fe $^{3 +}$ /Fe $^{2 +}$ and Fe $^{2 +}$ /Fe couples are 0.77 and –0.44 V, respectively. The standard reduction potential (in V) for the Fe $^{3 +}$ /Fe couple is
Chemistry · Electrochemistry · Numerical
Q59.When a perfect monolayer of stearic acid is formed at the air-water interface, each molecule of stearic acid (MW = 284, density = 0.94 g cm $^{- 3}$ ) occupies an area of 20 Å $^{2}$ . The length (in Å) of the molecule is …
Chemistry · Adsorption · Numerical
Q60.In an ideal monoatomic gas, the speed of sound is given by $\frac{5 R T}{3 M}$ . If the speed of sound in argon at 25 °C is 1245 km h $^{- 1}$ , the root mean square velocity in m s $^{- 1}$ is
Chemistry · Gaseous State · Numerical