Physical Chemistry - Chemistry Previous Year Questions

The numbers 17.0145 and 21.0235 were rounded to three figures after the decimal point. The resulting numbers, respectively, are

$$\text { Consider the following schematic plots of orbital wavefunction }\left(\psi_r\right) \text { against distance }(r) \text { from the nucleus. }$$

The figure representing two radial nodes in the orbital is

In an acidic medium, 10 mL of 0.25 M oxalic acid is titrated with $\mathrm{KMnO}_4$ solution. If the volume of $\mathrm{KMnO}_4$ solution required to reach end point is 10 mL , the strength of the $\mathrm{KMnO}_4$ solution is

$$\text { The correct order of solubility of the given salts in water at } 298 \mathrm{~K} \text { is }$$

$$\begin{array}{|l|l|} \hline \text { Salt } & \mathbf{K}_{\text {sp }} \text { at } \mathbf{2 9 8} \text { K } \\ \hline \mathrm{AgBr} & 5.0 \times 10^{-13} \\ \hline \mathrm{Zn}(\mathrm{OH})_2 & 1.0 \times 10^{-15} \\ \hline \mathrm{Hg}_2 \mathrm{Cl}_2 & 1.3 \times 10^{-18} \\ \hline \end{array}$$

Consider the following statements about the solutions formed by mixing two liquids.

A. An ideal solution thus formed obeys Raoult's law throughout the composition range.

B. Mixture of chloroform and acetone shows negative deviation from Raoult's law.

C. Mixture of aniline and phenol shows positive deviation from Raoult's law

$$\text { Consider the reversible processes for } 1.0 \mathrm{~mol} \text { of an ideal gas as shown in the figure. }$$

$w_1, w_2, w_3$ and $w_4$ represent work done (in calories) in the processes $1,2,3$ and 4 , respectively; $\Delta U_2$ and $\Delta U_4$ are changes in the internal energy for the processes 2 and 4, respectively.

[use $\mathrm{R}=2 \mathrm{cal} \mathrm{K}^{-1} \mathrm{~mol}^{-1}$ ]

The correct option is