Which of the following statements is incorrect about fractional distillation?Lighter fractions have lower boiling points - they evaporate first and rise to the top of the column.Fractional distillation is used to separate a mixture of liquids with different boiling points.Heavier fractions have higher boiling points - they evaporate later and sink to the bottom of the column.Fractional distillation is often used to purify water from a solution.

Which of the following statements about the process of fractional distillation is not correct? The temperature decreases going up the columnCrude oil is fed in near the bottom of the column as hot vapourThe different fractions condense into liquids when they reach the temperature of their boiling pointsThe fractions collected at the top contain hydrocarbons with the longest molecules

State the three stages of fractional distillation.

When crude oil is distilled using fractional distillation, 4 different pure liquids were obtained.   State the main factor in the crude oil mixture that allows the 4 liquids to be separated from one another.Read Lessdifference in their densitydifference in their coloursdifference in their boiling pintsdifference in their volumes

Given below are two statements:Statement I: Components of azeotropes can be separated by fractional distillation.Statement II: The solution which shows a large positive deviation from Raoult’s law form minimum boiling azeotropes at a specific composition.In the light of above statements, choose the correct answer from the options given below.

Briefly explain the process of fractional distillation to separate a mixture of the liquids methanol, ethanol and propanol.