Advertisements
Advertisements
प्रश्न
Give a brief description of the principle of the following technique taking an example.
Distillation
Advertisements
उत्तर
Distillation is used to separate volatile liquids from non-volatile impurities or a mixture of those liquids that have a sufficient difference in their boiling points.
Principle:
It is based on the fact that liquids having different boiling points vapourise at different temperatures. The vapours are then cooled and the liquids so formed are collected separately.
For example, a mixture of chloroform (b.p = 334 K) and aniline (b.p = 457 K) can be separated by the method of distillation. The mixture is taken in a round bottom flask fitted with a condenser. It is then heated. Chloroform, being more volatile, vaporizes first and passes into the condenser. In the condenser, the vapours condense and chloroform trickles down. In the round bottom flask, aniline is left behind.
APPEARS IN
संबंधित प्रश्न
How will you separate a mixture containing kerosene and petrol (difference in their boiling points is more than 25°C), which are miscible with each other?
Define :- Distillation
How is distillation more advantageous than evaporation?
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Fractional distillation :
Give a scientific reason.
A wet cloth is wrapped around a water storage container in summer.
Explain the difference between Separation by distillation and by separating funnel.
Pure water from impure water
- Give the principle involved in the separation of the mixture
- Give the technique of separation of the mixture.
Choose the correct option.
Which of the following methods can be used to separate two compounds with different solubilities in the same solvent?
Choose the correct option.
Which of the following techniques is used for the separation of glycerol from soap in the soap industry?
Why is a condenser used in distillation process?
What will happen if the upper outlet of the condenser is connected to the tap instead of the lower outlet?
Alcohol can be separated from water by ______.
Assertion (A): Simple distillation can help in separating a mixture of propan-1-ol (boiling point 97°C) and propanone (boiling point 56°C).
Reason (R): Liquids with a difference of more than 20°C in their boiling points can be separated by simple distillation.
Two liquids (A) and (B) can be separated by the method of fractional distillation. The boiling point of liquid (A) is less than boiling point of liquid (B). Which of the liquids do you expect to come out first in the distillate? Explain.
Draw a diagram of bubble plate type fractionating column. When do we require such type of a column for separating two liquids. Explain the principle involved in the separation of components of a mixture of liquids by using fractionating column. What industrial applications does this process have?
A mixture of benzene and chloroform is separated by ______.
