Column A Column B 1. A substance obtained by mixing two or more pure substances. (a) Sieving 2. A clear liquid obtained by the process of filtration. (b) Sublimate 3. Removing the husk from grain by farmers. (c) Sedimentation and Decantation 4. Removing insoluble impurities from muddy water by allowing it to settle and then pouring it out. (d) Mixture 5. A pure liquid obtained from its salt solution. (e) Distillate 6. A solid obtained from its hot vapour. (f) Winnowing 7. Process of separation of wheat bran from wheat flour. (g) Filtrate

1-d A substance obtained by mixing two or more pure substances is called a mixture. Mixtures can be homogeneous or heterogeneous. 2-g A clear liquid obtained by the process of filtration is known as filtrate. The filtrate is the liquid or solution that has passed through a filter paper. 3-f Winnowing is the process of removing husks from grains by the farmers with the help of wind. 4-c Removing insoluble impurities from muddy water by allowing it to settle and then pouring it out is called sedimentation and decantation. Here, insoluble solids are suspended down in the sedimentation process and clear liquids are poured out through decantation process. 5-e A pure liquid is obtained from its salt solution. This process is carried out by distillation where evaporation and recondensation are also performed. It is a separation technique that can be used to obtain almost pure components from the mixture. 6-b A solid from its hot vapour is obtained by the process of sublimation. Through this substance changes from a solid to a gas without ever passing through a liquid phase. 7-a The process of separation of wheat bran from wheat flour is done by sieving. It is a device for separating wanted elements from unwanted material by using a sieve. Column A Column B 1. A substance obtained by mixing two or more pure substances. (d) Mixture 2. A clear liquid obtained by the process of filtration. (g) Filtrate 3. Removing the husk from grain by farmers. (f) Winnowing 4. Removing insoluble impurities from muddy water by allowing it to settle and then pouring it out. (c) Sedimentation and Decantation 5. A pure liquid obtained from its salt solution. (e) Distillate 6. A solid obtained from its hot vapour. (b) Sublimate 7. Process of separation of wheat bran from wheat flour. (a) Sieving

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Science Success>Chapter 5 - Separation of Substances>EXERCISES>Q C

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When muddy water is filtered, the mud collects as filtrate.

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Important Questions on Separation of Substances

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Science Success>Chapter 5 - Separation of Substances>EXERCISES>Q C

Salt and sulphur can be separated by dissolving them in alcohol.

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Science Success>Chapter 5 - Separation of Substances>EXERCISES>Q C

A 'combine' is sometimes used for threshing.

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Science Success>Chapter 5 - Separation of Substances>EXERCISES>Q D

Column A	Column B
1. A substance obtained by mixing two or more pure substances.	(a) Sieving
2. A clear liquid obtained by the process of filtration.	(b) Sublimate
3. Removing the husk from grain by farmers.	(c) Sedimentation and Decantation
4. Removing insoluble impurities from muddy water by allowing it to settle and then pouring it out.	(d) Mixture
5. A pure liquid obtained from its salt solution.	(e) Distillate
6. A solid obtained from its hot vapour.	(f) Winnowing
7. Process of separation of wheat bran from wheat flour.	(g) Filtrate