Answer the following questions: (i) What is the common name of the polymer obtained by the…

Answer the following questions: (i) What is the common name of the polymer obtained by the polymerization of caprolactam? Is it addition polymer or condensation polymer? (ii) Why $\text{Zn}^{2+}$ ions are colourless while $\text{Ni}^{2+}$ ions are green and $\text{Cu}^{2+}$ ions are blue in colour? (iii) The molar conductivity of $\text{NaCl}$, $\text{CH}_3\text{COONa}$ and $\text{HCl}$ at infinite dilution is $126\cdot45$, $91\cdot0$ and $426\cdot16\text{ ohm}^{-1}\text{ cm}^2\text{ mol}^{-1}$ respectively. Calculate the molar conductivity ($\lambda_m^\infty$) for $\text{CH}_3\text{COOH}$ at infinite dilution. (iv) Identify the compounds A, B, C and D. $\text{C}_6\text{H}_5\text{COOH} \xrightarrow{\text{SOCl}_2} \text{A} \xrightarrow{\text{NH}_3} \text{B} \xrightarrow{\text{Br}_2 / \text{KOH}} \text{C} \xrightarrow[0 - 5^\circ\text{C}]{\text{NaNO}_2 + \text{HCl}} \text{D}$