IIT JAM 2022 Chemistry (CY) Question Paper with Answer Key pdf is available for download. The exam was conducted by IIT Roorkee on February 13, 2022. In terms of difficulty level, IIT JAM Chemistry (CY) was of Moderate level. The question paper comprised a total of 60 questions.
IIT JAM 2022 Chemistry (CY) Question Paper with Answer Key PDFs
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The reagent required for the following transformation
The major product formed in the following reaction
The major product formed in the following reaction
The major product formed in the following reaction
K + O\(_2\)
Which one of the following options is best suited for effecting the transformation?
The structure of \([XeF_8]^{2-}\) is
Among the following, the compound that forms the strongest hydrogen bond is
Among the following, the biomolecule with a direct metal-carbon bond is
For the reaction
H\(_2\)PO\(_4^-\) (aq) + OH\(^-\) (aq) \(\rightarrow\) HPO\(_4^{2-}\) (aq) + H\(_2\) (g)
the rate expression is \(k[H_2PO_4^-][OH^-]\). If the concentration of H\(_2\)PO\(_4^-\) is doubled, the rate is
The nature of interaction involved at the gas-solid interface in physisorption is
The major product formed in the following reaction
An organic compound having molecular formula C\(_9\)H\(_{10}\)O\(_2\) exhibits the following spectral characteristics:
^1H NMR: \(\delta 9.72\) (t, 1H), \(\delta 7.1\) (d, 2H), \(\delta 6.7\) (d, 2H), \(\delta 3.8\) (s, 3H), \(\delta 3.6\) (d, 2H)
IR: ~1720 cm\(^-1\)
The most probable structure of the compound is
The major product formed in the reaction of (2S,3R)-2-chloro-3-phenylbutane with NaOEt in EtOH is
The major product formed in the following reaction
The reactivity of the enol derivatives towards benzaldehyde follows the order
All possible lattice types are observed in the
The structure types of B\(_{10}\)H\(_{10}^{2-}\) and B\(_{10}\)H\(_{14}\), respectively, are
The ground state and the maximum number of spin-allowed electronic transitions possible in a Co\(^{2+}\) tetrahedral complex, respectively, are
The correct statement about the geometries of BH\(_2^+\) and NH\(_2^+\) based on valence shell electron pair repulsion (VSEPR) theory is
The order of increasing CO stretching frequencies in [Co(CO)\(_4\)]\(^{+}\), [Cu(CO)\(_4\)]\(^{+}\), [Fe(CO)\(_4\)]\(^{2-}\) and [Ni(CO)\(_4\)] is
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
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
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
The ratio of the 2p \(\rightarrow\) 1s transition energy in He\(^+\) to that in the H atom is closest to
The phase diagram of water is best represented by
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 \(\theta_w\) and \(\theta_m\), respectively. The contact angles satisfy the conditions
The Maxwell-Boltzmann distribution \( f(v_x) \) of one-dimensional velocities \( v_x \) at temperature T is
[Given: \( A \) is a normalization constant such that \( \int_{-\infty}^{\infty} f(v_x) \, dv_x = 1 \), and \( k_b \) is the Boltzmann constant]
The potential for a particle in a one-dimensional box is given as:
\( V(x) = 0 for 0 \leq x \leq L, \) and \( V(x) = \infty elsewhere. \)
The locations of the internal nodes of the eigenfunctions \( \psi_n(x) \), \( n \geq 2 \), are
[Given: \( m \) is an integer such that \( 0 < m < n \)]
The number of CO stretching bands in the infrared spectrum of Fe(CO)\(_5\) is
The standard Gibbs free energy change for the reaction
H\(_2\)O(g) \(\rightarrow\) H\(_2\)(g) + \(\frac{1}{2}\)O\(_2\)(g)
at 2500 K is \( +118 \, kJ mol^{-1} \). The equilibrium constant for the reaction is
[Given: \( R = 8.314 \, J K^{-1} mol^{-1} \)]
Among the following, the reaction(s) that favor(s) the formation of the products at 25°C is/are
Among the following, the correct statement(s) is/are:
The compound(s) that participate(s) in the Diels-Alder reaction with maleic anhydride is/are
Among the following, the suitable route(s) for the conversion of benzaldehyde to acetophenone is/are
The reaction involves(s)
The reason(s) for the lower stability of \( Si_2H_6 \) compared to \( C_2H_6 \) is/are
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 \( C_{v,m} \) is/are
Zinc containing enzyme(s) is/are
The conversion of ICl to ICl\(^+\) involves(s)
The common point defect(s) in a solid is/are
Among the following, the number of aromatic compounds is
The number of stereoisomers possible for the major product formed in the reaction
is
The number of signals observed in the 1H NMR spectrum of the compound
is
The reaction of 122 g of benzaldehyde with 108 g of phenylhydrazine
gave 157 g of the product.
\[ The yield of the product is \, \mathbf{?} \, (round off to the nearest integer) \]
The B-B bond order in \( B_2 \) is
The number of unpaired electrons in \( [Co(H_2O)_6]^{2+} \) is
The number of significant figures in \( 5.0820 \times 10^2 \) is
The d spacing for the first-order X-ray ( \( \lambda = 1.54 \, Å \)) diffraction event of metallic iron (fcc) at \( 2\theta = 20.2^\circ \) is
(round off to three decimal places)
The volume fraction for an element in an fcc lattice is
(round off to two decimal places)
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
(round off to the nearest integer)
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
(round off to the nearest integer)
The number of \(\beta\) particles emitted in the nuclear reaction \[ ^{238}_{92}U \rightarrow ^{206}_{82}Pb \]
\text{is
Iron is extracted from its ore via the reaction \[ Fe_2O_3 + 3CO \rightarrow 2Fe + 3CO_2 \]
\text{The volume of CO (at STP) required to produce 1 kg of iron is
Total degeneracy (number of microstates) for a Ti\(^{3+}\) ion in spherical symmetry is
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 \(\Delta G^\circ\) for the reaction when 1.0 mol of Zn gets dissolved is
(round off to the nearest integer)
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
(round off to one decimal place)
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
(round off to the nearest integer)
The pH of an aqueous buffer prepared using CH\(_3\)COOH and CH\(_3\)COO\(^-\) and Na\(^+\) is 4.80.
The quantity \[ \frac{[CH_3COO^-] - [CH_3COOH]}{[CH_3COOH]} \] is
(round off to three decimal places)
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
(round off to one decimal place)
For a van der Waals gas, the critical temperature is 150 K and the critical pressure is \(5 \times 10^6\) Pa. The volume occupied by each gas molecule is
(round off to two decimal places)
View Solution
Step 1: Use the Van der Waals equation.
The volume occupied by each gas molecule is related to the critical temperature and pressure by the van der Waals equation. The volume per molecule at the critical point is given by: \[ V_c = \frac{RT_c}{P_c} \]
where \(V_c\) is the volume per molecule, \(R = 8.314 \, J/mol·K\) is the gas constant, \(T_c = 150 \, K\) is the critical temperature, and \(P_c = 5 \times 10^6 \, Pa\) is the critical pressure.
Step 2: Substituting the given values.
\[ V_c = \frac{8.314 \times 150}{5 \times 10^6} = \frac{1247.1}{5 \times 10^6} = 2.494 \times 10^{-4} \, m^3 \]
Step 3: Convert the volume to \(Å^3\).
Since 1 \(m^3 = 10^{30} \, Å^3\), \[ V_c = 2.494 \times 10^{-4} \times 10^{30} = 2.49 \times 10^{26} \, Å^3 \]
Step 4: Conclusion.
The volume occupied by each gas molecule is approximately \(2.49 \times 10^{26} \, Å^3\). Quick Tip: The volume per molecule for a gas at critical conditions can be calculated using the equation \(V_c = \frac{RT_c}{P_c}\).
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