Question

What is meant by elevation in boiling point? Why is it a colligative property?

(i) Following reactions occur at cathode during the electrolysis of aqueous silver chloride solution : $\mathbf{Ag}^{+}(\mathbf{aq})+\mathbf{e}^{-}\rightarrow\mathbf{Ag}(\mathbf{s})\qquad\qquad\mathbf{E}^{\circ}$ = +0.80 V $\mathrm{H}^{+}(\mathrm{aq})+\mathrm{e}^{-}\rightarrow\frac{1}{2}\mathrm{H}_{2}(\mathrm{g})~~~~~~~~~\mathrm{E}^{\circ}$ = 0.00 V On the basis of their standard reduction electrode potential (E°) values, which reaction is feasible at the cathode and why ? (ii) Define limiting molar conductivity. Why conductivity of an electrolyte solution decreases with the decrease in concentration ?

State Henry’s law. What is the effect of temperature on the solubility of a gas in a liquid ?

Define an ideal solution and write one of its characteristics.

Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with oxalic acid ? Write the ionic equations for the reactions.

State Henry’s law and mention two of its important applications.

The partial pressure of ethane over a saturated solution containing 6.56 × 10⁻² g of ethane is 1 bar. If the solution were to contain 5.0 × 10⁻² g of ethane, then what will be the partial pressure of the gas ?