List of top Physical Chemistry Questions

The behavior of \(Cl_2\) is closest to ideal gas behavior at 
 

Among the following hydrocarbon(s), how many of them would give rise to three groups of proton NMR peaks with 2:2:3 integration ratio? 

Consider the reaction \( \text{CO}(g) + \frac{1}{2} \text{O}_2(g) \longrightarrow \text{CO}_2(g) \).
The value of \( \Delta U \) for the reaction at 300 K is -281.8 kJ mol\(^{-1}\). The value of \( \Delta H \) at same temperature is ......... kJ mol\(^{-1}\). 
[R = 8.3 J K\(^{-1}\) mol\(^{-1}\)] 
 

The magnitude of crystal field stabilization energy (CFSE) of octahedral \( \text{[Ti(H}_2\text{O)}_6]^{3+} \) complex is 7680 cm\(^{-1}\). The wavelength at the maximum absorption (\( \lambda_{\text{max}} \)) of this complex is ............ nm (rounded up to the nearest integer).
 

The emf of a standard cadmium cell is 1.02 V at 300 K. The temperature coefficient of the cell is \( -5.0 \times 10^{-5} \, \text{V K}^{-1} \). The value of \( \Delta H^\circ \) for the cell is ............ kJ mol\(^{-1}\) (rounded up to two decimal places). 

[1 F = 96500 \(C mol^{–1}\)]
 

For the reaction \( \text{H}_2 (g) + \frac{1}{2} \, \text{O}_2 (g) \longrightarrow \, \text{H}_2\text{O}(l) \), the following information is given: \[ \Delta H^\circ = -285 \, \text{kJ/mol}, \, S^\circ_{\text{H}_2\text{O}(l)} = 70 \, \text{J K}^{-1} \, \text{mol}^{-1}, \, S^\circ_{\text{O}_2(g)} = 204 \, \text{J K}^{-1} \, \text{mol}^{-1}, \, S^\circ_{\text{H}_2(g)} = 130 \, \text{J K}^{-1} \, \text{mol}^{-1} \] The value of \( \Delta S^\circ_{\text{universe}} \) for the reaction is ........... J K\(^{-1}\) mol\(^{-1}\). 
 

For \( \text{H}_2 \) molecule, the fundamental vibrational frequency \( \nu_e \) can be taken as 4400 cm\(^{-1}\). The zero-point energy of the molecule is ................ kJ/mol (rounded up to two decimal places). 
\[\left[ h = 6.6 \times 10^{-34}\,\mathrm{J\,s}, \; c = 3 \times 10^{8}\,\mathrm{m\,s^{-1}}, \; N_A = 6 \times 10^{23}\,\mathrm{mol^{-1}} \right]\]

 

The solubility of \( \text{PbI}_2 \) in 0.10 M KI(aq) is ........... \( \times 10^{-7} \) M (rounded up to two decimal places). 
\(\text{[The solubility product, \( K_{\text{sp}} = 7.1 \times 10^{-9} \)]}\)