List of top Chemistry Questions asked in CUET (PG)

In the Vibrational Raman Spectra, the value of transition energy for the first overtone \( \Delta E_{\text{overtone}} \) is:

According to the moving boundary method, the transport number of the cation \( t_{\text{+}} \) of the principle electrolyte is calculated using the formula Given: \( l \) is the length by which the boundary has moved. The electrolyte of concentration \( c \) is kept in a long vertical tube with area of cross section \( A \).

Which of the following statement is incorrect about the nature of chemisorption?

At 0 K, the molecule CO exists in two alternate arrangements (CO and OC) in the solid crystal. The value of the entropy is (where thermodynamic probability \( W = k^N \)):

For 3 mol of an ideal gas \(\left[ C_{p,m} = \frac{5}{2}R \right]\), being heated from 300 K to 600 K, the change in entropy at constant pressure is

The chemical potential of one component of a mixture cannot change independently of the chemical potentials of the other components. This statement relates to:

For an ideal gas undergoing reversible isothermal expansion, the function \( G \) and \( A \) are given as \( G = H - TS \) and \( A = U - TS \), respectively. Choose the correct answer from the options given below: (A) \( \Delta G = \Delta A \)
(B) \( \Delta(PV) = 0 \)
(C) \( \Delta G > \Delta A \)
(D) \( \Delta(nRT) = 0 \)

The standard enthalpy of formation for which of the element is not zero at 1 bar pressure and specified temperature?

Arrange the dissociation constant of phosphoric acid in increasing order. \[\begin{aligned} \text{H}_3\text{PO}_4 + \text{H}_2\text{O} &\rightleftharpoons \text{H}_3\text{O}^+ + \text{H}_2\text{PO}_4^- \quad (K_{\text{a1}}) \\ \text{H}_2\text{PO}_4^- + \text{H}_2\text{O} &\rightleftharpoons \text{H}_3\text{O}^+ + \text{HPO}_4^{2-} \quad (K_{\text{a2}}) \\ \text{HPO}_4^{2-} + \text{H}_2\text{O} &\rightleftharpoons \text{H}_3\text{O}^+ + \text{PO}_4^{3-} \quad (K_{\text{a3}}) \\ \end{aligned}\]

An ideal gas expands isothermally from an initial volume \( V_i \) and pressure \( P_i \) to a final volume \( V_f \). If the same gas is allowed to expand adiabatically from the same initial volume and pressure to the final volume \( V_f \), then

Match the name of the law given in List-1 with the relation/formula given in List-2: \[\begin{array}{|c|c|} \hline \textbf{List-I (Law Name)} & \textbf{List-II (Relation/Formula)} \\ \hline \text{(A) Boyle's Law} & \text{(III) \(PV = \text{Constant}\)} \\ \hline \text{(B) Charles' Law} & \text{(I) \(\tfrac{V}{T} = \text{Constant}\)} \\ \hline \text{(C) Avogadro's Law} & \text{(IV) \(V \propto n\)} \\ \hline \text{(D) Graham's Law of Diffusion} & \text{(II) \(\tfrac{T_1}{T_2} = \tfrac{M_2}{M_1}\)} \\ \hline \end{array}\] Choose the correct answer from the options given below:

Arrange the following compounds in decreasing order of their rates of hydrolysis with water. (A) Acetamide
(B) Acetyl chloride
(C) Ethyl acetate
(D) Acetic anhydride
Choose the correct answer from the options given below:

Consider the following statements with respect to Benzil-Benzylic acid rearrangement and Cannizzaro's reaction: \[\begin{array}{rl} \bullet & \text{(A) Both are base catalyzed reactions.} \\ \bullet & \text{(B) Both reactions involve shifting of an anion in their mechanism.} \\ \bullet & \text{(C) Both reactions can occur inter-molecularly and intra-molecularly.} \\ \bullet & \text{(D) Both involve simultaneous redox reactions.} \\ \end{array}\] Choose the correct answer from the options given below:

The following transformation is carried out by: \includegraphics[width=0.5\textwidth]{08.jpeg} Choose the correct answer from the options given below:

Match List-I with List-II:\[\begin{array}{|c|c|} \hline \textbf{List-I (Reaction Name)} & \textbf{List-II (Reactant)} \\ \hline \text{(A) Friedlander's synthesis} & \text{(I) o-Aminobenzaldehyde} \\ \hline \text{(B) Doebner-Miller's synthesis} & \text{(III) Aniline} \\ \hline \text{(C) Hantzsch's synthesis} & \text{(IV) \(\beta\)-Ketoneester} \\ \hline \text{(D) Bischler-Napieralski's synthesis} & \text{(II) \(\beta\)-Phenylethylamide} \\ \hline \end{array}\] Choose the correct answer from the options given below:

Which correct sequence of reactions are applied to achieve the following transformation? \[ \text{Benzoyl Chloride} \xrightarrow{H_2, \text{Pd-BaSO}_4} \xrightarrow{\text{dil. NaOH}} \text{Cinnamaldehyde} \] Choose the correct sequence of reactions from the options given below:

The final product (D) in the above conversion is: \[ \text{Me} - \text{CH}_3 \xrightarrow{\text{H}_2, \text{(mol)}, \text{Ni}} \text{(A)} \xrightarrow{\text{PhCO}_2\text{H}, \text{H}_2\text{O}} \text{(B)} \xrightarrow{\text{NaOEt, EtOH}} \text{(C)} \xrightarrow{\text{EtMgBr, Et}_2\text{O}} \xrightarrow{\text{H}_2\text{O}} \text{(D)} \] The options are:

Consider the following statements with respect to citral: \[\begin{array}{rl} \bullet & \text{(A) Geranial and Neral are geometrical isomers of citral.} \\ \bullet & \text{(B) It forms geranic acid on heating with potassium hydrogen sulfate.} \\ \bullet & \text{(C) It gives 6-methylhept-5-en-2-one on treating with potassium carbonate.} \\ \bullet & \text{(D) On oxidation with silver oxide it yields Laevolic acid.} \\ \end{array}\] Choose the correct answer from the options given below: