Acetone and carbon disulphide form binary liquid solution showing positive deviation from Raoult’s law. The normal boiling point (Tb) of pure acetone is less than that of pure \(CS_2\). Pick out the
incorrect statement among the following-
(a) Boiling temperature of the mixture is always less than the boiling temperature of acetone
(b) Boiling temperature of Azeotropic mixture is always less than the boiling temperature of acetone
(c) When a small amount of \(CS_2\) (less volatile component) is added to an excess of acetone boiling point
of the resulting mixture increases
(d) A mixture of \(CS_2\) and \(CH_3\)\(COCH_3\) can be completely separated by simple fractional distillation
An antifreeze solution is prepared from 222.6 g of ethylene glycol \(C_2\)\(H_4\)\((OH)_2\) and 200 g of water. Calculate the molality of the solution. If the density of this solution be 1.072 \(gmL^{-1}\), what will be the molarity of the solution?
(a) 7.20 M
(b) 12.03 M
(c) 9.11 M
(d) 6 M
When mercuric iodide is added to the aqueous solution of potassium iodide, the:
(a) Freezing point is raised
(b) Freezing point does not change
(c) Freezing point is lowered
(d) Boiling point does not change
The molal elevation constant depends upon
(a) nature of solute.
(b) nature of the solvent.
(c) vapour pressure of the solution.
(d) enthalpy change.
The osmotic pressure of a solution is directly proportional to
(a) the molecular concentration of the solute.
(b) the absolute temperature at a given concentration.
(c) the lowering of vapour pressure.
(d) all the above.
Which of the following aqueous solutions containing 10 g of solute in each case, has highest m.p.?
(a) NaCl solution
(b) KCl solution
(c) sugar solution
(d) glucose solution
Equimolar solutions in the same solvent have-
(a) Same boiling point but different freezing point
(b) Same freezing point, but different boiling point
(c) Same boiling and same freezing point
(d) Different boiling and different freezing points
Consider the figure and mark the correct option.
(a) water will move from side (A) to side (B) if a pressure lower than osmotic pressure is applied on piston (B).
(b) water will move from side (B) to side (A) if a pressure greater than osmotic , pressure is applied on piston (B).
(c) water will move from side (B) to side (A) if a pressure equal to osmotic pressure is applied on piston (B).
(d) water will move from side (A) to side (B) if pressure equal to osmotic pressure is applied on piston (A).
Which of the following is incorrect for an ideal solution?
(a) \(∆H_{mix}\) =0
(b) \(∆V_{mix}\) = 0
(c) ∆P = \(P_{obs}\) – \(P_{calculated}\) = 0
(d) \(∆G_{mix}\) = 0