Define the following terms:
(i) Abnormal molar mass (ii) Van't Hoff factor (i)

Explanation

(i) Abnormal molar mass: When the molar of a substance determined by studying any of the colligative properties comes out to be different than theoretically expected value, the substance is said to show abnormal molar mass.
(ii) Van't Hoff factor (i): It is defined as the ratio of the exaperimental value of the colligative property of the calculated value of the colligative property.
`i = ("Experimental value of colligative property")/("Calculated value of colligative property")`
`= ("Observed value of colligative property")/("Normal value of the same property")`