Fill in the blanks by choosing the appropriate word/words from those given in the brackets: (more…

Fill in the blanks by choosing the appropriate word/words from those given in the brackets: (more than, primary, cathode, Lucas reagent, two, four, less than, Grignard’s reagent, tertiary, anode, zero, equal to, three) (i) The elevation of boiling point of $0\cdot5\text{ M K}_2\text{SO}_4$ solution is ___________that of $0\cdot5\text{ M}$ urea solution. The elevation of boiling point of $0\cdot5\text{ M KCl}$ solution is __________ that of $0\cdot5\text{ M K}_2\text{SO}_4$ solution. (ii) A mixture of conc. $\text{HCl}$ and anhydrous $\text{ZnCl}_2$ is called __________ which shows maximum reactivity with _________ alcohol. (iii) In electrolytic refining the impure metal is made __________ while a thin sheet of pure metal is used as _________. (iv) When the concentration of a reactant of first order reaction is doubled, the rate of reaction becomes _________ times, but for a __________ order reaction, the rate of reaction remains the same.

Select the correct alternative from the choices given: (i) The cell reaction is spontaneous or feasible when emf of the cell is: (1) negative (2) positive (3) zero (4) either positive or negative (ii) Which, among the following polymers, is a polyester: (1) melamine (2) bakelite (3) terylene (4) polythene (iii) The correct order of increasing acidic strength of the oxoacids of chlorine is: (1) $\text{HClO}_3 < \text{HClO}_4 < \text{HClO}_2 < \text{HCl}$ (2) $\text{HClO} < \text{HClO}_2 < \text{HClO}_3 < \text{HClO}_4$ (3) $\text{HClO}_2 < \text{HClO} < \text{HClO}_4 < \text{HClO}_3$ (4) $\text{HClO}_3 < \text{HClO}_4 < \text{HClO} < \text{HClO}_2$ (iv) A catalyst is a substance which: (1) changes the equilibrium constant of the reaction. (2) increases the equilibrium constant of the reaction. (3) supplies energy to the reaction. (4) shortens the time to reach equilibrium.

Match the following:

Answer the following questions: (i) (1) Which trivalent ion has maximum size in the Lanthanoid series i.e. Lanthanum ion ($\text{La}^{3+}$) to Lutetium ion ($\text{Lu}^{3+}$)? (at. no. of Lanthanum = 57 and Lutetium = 71) (2) Explain why $\text{Cu}^{2+}$ is paramagnetic but $\text{Cu}^+$ is diamagnetic. (at. no. of Cu = 29) (ii) When a coordination compound $\text{CoCl}_3 \cdot 6\text{NH}_3$ is mixed with $\text{AgNO}_3$, three moles of $\text{AgCl}$ are precipitated per mole of the compound. Write the structural formula and IUPAC name of the coordination compound. (iii) Calculate the boiling point of urea solution when $6\text{ g}$ of urea is dissolved in $200\text{ g}$ of water. ($K_b\text{ for water} = 0\cdot52\text{ K kg mol}^{-1}$, boiling point of pure water = $373\text{ K}$, mol. wt. of urea = $60$) (iv) Identify the compounds A, B, C and D in the given reaction: $\text{HC} \equiv \text{CH} \xrightarrow[\text{Hg}^{2+}/\text{H}_2\text{SO}_4]{\text{H}_2\text{O}} \text{A} \xrightarrow[\text{K}_2\text{Cr}_2\text{O}_7 + \text{H}_2\text{SO}_4]{[\text{O}]} \text{B} \xrightarrow{\text{Ca(OH)}_2} \text{C} \xrightarrow[\text{dry distillation}]{\text{heat}} \text{D}$