List of top Chemistry Questions asked in KEAM

The IUPAC name of the complex $[\text{Cr(NH}_3)_3(\text{H}_2\text{O})_3]\text{Cl}_3$ is:

Coordination compounds exhibit different types of isomerism. Some complexes are given in Column I, and the type of isomerism is given in Column II.

$$\begin{array}{|l|l|} \hline \textbf{Column I} & \textbf{Column II} \\ \hline (a) [\text{Pt(NH}_3)_2\text{Cl}_2] & (i) \text{Ionisation isomerism} \\ \hline (b) [\text{Co(en)}_3]^{3+} & (ii) \text{Linkage isomerism} \\ \hline (c) [\text{Cr(NH}_3)_5(\text{SO}_4)]\text{Br} & (iii) \text{Optical isomerism} \\ \hline (d) [\text{Co(NH}_3)_5(\text{NO}_2)]\text{Cl}_2 & (iv) \text{Geometrical isomerism} \\ \hline \end{array}$$

The standard molar entropies of $\text{SO}_2(g)$, $\text{SO}_3(g)$, and $\text{O}_2(g)$ are:

• $S^\circ_{\text{SO}_2} = 250$ J/K·mol
• $S^\circ_{\text{SO}_3} = 257$ J/K·mol
• $S^\circ_{\text{O}_2} = 205$ J/K·mol

Calculate the standard molar entropy change for the reaction:

$$2\text{SO}_2(g) + \text{O}_2(g) \rightarrow 2\text{SO}_3(g)$$

The standard entropy change ($\Delta S^\circ$) is given by:

$$\Delta S^\circ = \sum S^\circ_{\text{products}} - \sum S^\circ_{\text{reactants}}$$