Is lowering of vapour pressure a colligative property assertion?
A colligative property depends only on the ratio of the number of particles of solute and solvent in the solution, not the identity of the solute. Relative lowering of vapour pressure is considered to be a colligative property.
Assertion: Lowering in vapour pressure is not a colligative property. Reason: Lowering of vapour pressure of a solvent depends on the number of moles of the solute dissolved in given amount of the solvent at a given temperature.
Vapour pressure is not a colligative property but relative lowering of vapor pressure is a colligative property.
Assertion :Lowering of vapour pressure is directly proportional to osmotic pressure of the solution. Reason: Osmotic pressure is a colligative property.
Vapor pressure lowering is a colligative property of solutions. The vapor pressure of a pure solvent is greater than the vapor pressure of a solution containing a non volatile liquid. This lowered vapor pressure leads to boiling point elevation.
Among the options, optical activity is not a colligative property.
Why is vapor pressure considered to be a colligative property? Because vapor pressure of a substance depends on the concentration of solute molecules in the vapor state.
Colligative properties are the physical changes that result from adding solute to a solvent. Colligative Properties depend on how many solute particles are present as well as the solvent amount, but they do NOT depend on the type of solute particles, although do depend on the type of solvent.
Since osmotic pressure is directly proportional to the number of moles (or we can say the concentration) of the solute, it resembles the definition of colligative property. Hence, we can say that it is considered as a colligative property.
Hence, Vapour pressure is a colligative property.
Which one of the following statements is incorrect greater the lowering of vapour pressure?
Hence, option B is incorrect because greater the lowering of vapour pressure, lower is the freezing point of the solution.
Raoult's law is stated as: The relative lowering in vapor pressure of an ideal solution containing the non-volatile solute is equal to the mole fraction of the solute at a given temperature.
Hence, Vapour pressure is a colligative property.
Colligative properties are the physical changes that result from adding solute to a solvent. Colligative Properties depend on how many solute particles are present as well as the solvent amount, but they do NOT depend on the type of solute particles, although do depend on the type of solvent.
Colligative property depends just on number of solute particles present in the solution.
- Boiling point elevation.
- Freezing point depression.
- Relative lowering of vapour pressure.
- Osmotic pressure.
