Advertisements
Advertisements
प्रश्न
Assertion (A): The enthalpy of mixing Δmix H is equal to zero for an ideal solution.
Reason (R): For an ideal solution the interaction between solute and solvent molecules is stronger than the interactions between solute-solute or solvent-solvent molecules.
विकल्प
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(A) is true, but (R) is false.
(A) is false, but (R) is true.
Advertisements
उत्तर
Both (A) and (R) are true and (R) is the correct explanation of (A).
Explanation:
For an ideal solution, the enthalpy of mixing and the volume of mixing are both zero. This is because the intermolecular forces of attraction between two solute particles and two solvent particles are the same as the forces of attraction between a solute particle and a solvent particle.
APPEARS IN
संबंधित प्रश्न
How is the sign of ΔmixH related to positive deviations from Raoult’s law?
Heptane and octane form an ideal solution. At 373 K, the vapour pressures of the two liquid components are 105.2 kPa and 46.8 kPa respectively. What will be the vapour pressure of a mixture of 26.0 g of heptane and 35 g of octane?
Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
Ideal solutions obey ………. law and they …………. form azeotropic mixtures.
(Henry’s, aldol condensation, absence, do not, ohm, Raoult’s, increases, common ion effect, easily, three, solubility product, ohm-1, two, four, ohm-1, cm2, Cannizzaro, ohm-1 cm-1, zero, decreases, presence)
Which solution has the lower freezing point? 10 g of methanol (CH3OH) in 100g g of water (or) 20 g of ethanol (C2H5OH) in 200 g of water.
The rate at which a solid dissolves in liquid does not depend on ____________.
Which relationship is not correct?
Which of the following is an example of a solid solution?
Assertion: When a solution is separated from the pure solvent by a semipermeable membrane, the solvent molecules pass through it from pure solvent side to the solution side.
Reason: Diffusion of solvent occurs from a region of high concentration solution to a region of low concentration solution.
What type of deviation from Roult’s Law is expected when phenol and aniline are mixed with each other? What change in the net volume of the mixture is expected? Graphically represent the deviation.
Suggest the most important type of intermolecular attractive interaction in the following pair:
I2 and CCl4
