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

Low concentration of oxygen in the blood and tissues of people living at high altitude is due to- (a) low temperature (b) low atmospheric pressure (c) high atmospheric pressure (d) both low temperature and high atmospheric pressure

Assertion: An aqueous solution of NaCl freezes below 273 K. Reason: Vapour pressure of the solution is less than that of the pure solvent. A. If both Assertion and Reason are correct and reason is the correct explanation of Assertion . B. If both Assertion and Reason are correct and reason is not correct explanation of Assertion C. If Assertion is correct but Reason is incorrect. D. If Assertion is incorrect and Reason is correct.

Assertion: Isotonic solutions do not show any osmosis when placed side by side. Reason: Isotonic solutions have same solute concentration. A. If both Assertion and Reason are correct and reason is the correct explanation of Assertion . B. If both Assertion and Reason are correct and reason is not correct explanation of Assertion C. If Assertion is correct but Reason is incorrect. D. If Assertion is incorrect and Reason is correct.

Assertion: Molarity of the solution changes with temperature. Reason: Molarity is a colligative property. A. If both Assertion and Reason are correct and reason is the correct explanation of Assertion . B. If both Assertion and Reason are correct and reason is not correct explanation of Assertion C. If Assertion is correct but Reason is incorrect. D. If Assertion is incorrect and Reason is correct.

Assertion: Cooking time is reduced in pressure cooker. Reason: Boiling point of water inside the pressure cooker is lowered. A. If both Assertion and Reason are correct and reason is the correct explanation of Assertion . B. If both Assertion and Reason are correct and reason is not correct explanation of Assertion C. If Assertion is correct but Reason is incorrect. D. If Assertion is incorrect and Reason is correct.

Assertion: 1 M glucose will have a higher boiling point than 2 M glucose. Reason: Elevation in boiling point is a colligative property which depends upon the number of particles of solute in the solution. A. If both Assertion and Reason are correct and reason is the correct explanation of Assertion . B. If both Assertion and Reason are correct and reason is not correct explanation of Assertion C. If Assertion is correct but Reason is incorrect. D. If Assertion is incorrect and Reason is correct.