Which observation(s) reflect(s) colligative properties? (i) a 0.80 m nabr aqueous solution has a lower vapor pressure than pure water. (ii) a salt and water solution will remain liquid even below 0°c (iii) pure water freezes at a higher temperature than pure methanol (ch3oh)

(I) A 0.80 m NaBr aqueous solution has a lower vapor pressure than pure water.

(II) A salt and water solution will remain liquid even below 0°C

Explanation:

The properties of a solution are quite different from the properties of the pure solvent. A pure solvent will have greater vapour pressure than its solution. Also, a solution will have a lesser freezing point than the pure solvent. All these observations are called colligative properties. They depend on the amount of solute present in the sample and not really the identity of the solute particles.

Hence the answer provided above.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.