NaCl is non-volatile but HCl is volatile-explainwith reason.

Name a volatile substance

Addition of excess AgNO_(3) to NaCl solution gives positively charged AgCl sol, while AgNO_(3) solution on treating with excess of NaCl solution yields negatively charged AgCl sol. Explain with reason.

This question has statement I and II. Of the four choices given after the statements, choose the one that best describes the two statements. Statement - I : The boiling point of 0.1 M urea solution is less than that of 0.1 M KCI solution. Statement -II : Elevation of boiling point is directly proportional to the number of moles of non-volatile solute particles present in the solution.

In which of the following purification methods, the metal is first converted into its volatile compound and then it is decomposed to give the pure metal-

Addition of non-volatile solute always increases the boiling point of the solution. Why?

The relative lowering of vapour pressure of an aqueous solution containing a non-volatile solute is 0.0125. The molality of the solution is

The vapour pressure of a solvent at 25^@C is 270 mm Hg. Calcualte the number of moles of a non-volatile solute per mole of solvent needed to get a solution with vapour pressure 170 mm Hg at 25^@C .

Show graphically how the vapour pressures of a solvent and a solution of a non-volatile solute in it change with temperature. Show on the graph boiling point of the solvent and the solution. Which is higher and why?