Methods of Separation of Mixtures
Methods of Separation of Mixtures: Overview
This topic describes different methods used in separating substances. Students will learn about different processes that are used in separating mixtures.
Important Questions on Methods of Separation of Mixtures
Deepika was travelling in a train with her father in the coastal regions of Kutch in Gujarat State. She noticed that there were shallow pits along the railway line filled with sea water. In some pits there was a white powdery substance. She also noticed small mounds of white substance collected by the workers. She wanted to know about such things, so she asked all such concerning questions to her father. Her father clarified her questions politely.
Answer the following questions based on above information:
(i) What are the values shown by Deepika in asking such questions?
(ii) How is the white powdery substances collected?
How is common salt obtained from the sea water?
Is it possible to separate wheat flour from sugar crystals? If so how?
What is the difference between winnowing and sieving?
What is winnowing? Who uses the winnowing and how?
What is sieving? Where is it used? Give two examples.
How will you remove impurities from a sample of pulses or rice before cooking?
Why do we need to separate different components of a mixture? Give at least two examples.
The statement given below is incorrect. Write the correct statement.
The process by which "paneer" is removed from curdled milk is called decantation.
The statements given below is incorrect. Write the correct statement.
The common salt is obtained from sea water by the process of condensation.
The statement given below is incorrect. Write the correct statement.
The process by which the insoluble components of muddy water settle down is called decantation.
The statement given below is incorrect. Write the correct statement.
The removal of husk from grain is done by the process of sieving.
Match the statements in the column A with those in column B.
| Column A | Column B |
| 1. The process of removing insoluble particles of suspension by passing it through filter paper. |
(a) Sieving |
| 2. The process of obtaining soluble salt from its solution. | (b) Churning |
| 3. The process of obtaining butter from curd. | (c) Loading |
| 4. The process of making particles of mud heavy with alum. | (d) Filtration |
| 5. The process of separation of chaff from wheat flour. | (e)Evaporation |
Churning is used to obtain pure water from salt solution.
The process of winnowing is used to remove pebbles from grain.
A mixture of coconut oil and water can be separated by using separating funnel.
A mixture of powdered salt and sugar can be separated by the process of sieving.
Loading helps the clay particles in a suspension to settle down.
A mixture of sugar and water can be separated by filtration.
Fill in the blank space by choosing correct words from the list given below .
List : evaporation, churning, threshing, sieving, sedimentation, winnowing, condensation, hand-picking.
The process due to which steam changes into the liquid state on cooling is called _____.
