Respuesta :
Answer:
(B)
Explanation:
The colligative properties of any given solution are properties that are dependent on the concentration of the molecules or ions of the solute in the solution, and not on the type or identity of that solute. Examples of colligative properties:
1. Lowering of vapour pressure
2. Elevation of boiling point,
3. Depression of freezing point and
4. Osmotic pressure
(A) is not a colligative property because the scenario talks about the freezing point of a pure solvent and not a solution.
(C) is not a colligative property because the solutions being compared are completely different (the solutes are different).
(B) is a colligative property because it talks about the freezing point of a solution
The colligative property has been depicted by the lowering in freezing with addition of NaOH, and change in vapor pressure with NaBr and [tex]\rm BaCl_2[/tex]. Thus, option B and C are correct.
Colligative property has been defined as the property that has been mediated with the change in the concentration of the solute in a solution.
Which is a colligative property?
The depression in freezing, elevation in boiling and lowering of pressure has been termed as the colligative property of the solution.
(A) The pure water has been free from solutes, and the freezing point has been independent of the concentration of solute in pure water and methanol.
Thus, it is not a colligative property.
(B) The comparison has been made with the solution and pure water. It has been depicting that addition of solute NaOH results in lowering of freezing point.
Thus, it is a colligative property.
(C) The solution has been consisted of solutes and the nature of solutes and their concentration results in the change in the vapor pressure.
Thus, it is a colligative property.
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