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Answer :
Final answer:
The correct answers to the questions on separation methods involve techniques such as hand picking for stones and rice, winnowing for grains, and filtration for mixtures like chalk powder in water. Other methods include evaporation for obtaining salt from seawater and using a magnet for separating metallic substances. Understanding the various methods is crucial in chemistry for effectively separating and purifying substances.
Explanation:
Methods of Separation
In these questions, various methods of separation are asked regarding mixtures. Here are the answers to each:
- 1) The method of separation used to separate stone from rice is: C. Hand picking.
- 2) The separation of grains from husk is done by the: D. Winnowing.
- 3) Chalk powder suspension in water can be separated by: C. Filtration.
- 4) A solution of salt is a: C. Homogeneous mixture.
- 5) The process by which the unwanted solid particles are removed from the liquid is called: C. Filtration.
- 6) Cleaning of flour is done by the process of: C. Sieveing.
- 7) Tiny pieces of stones are usually separated from pulses before cooking by the method called: A. Hand picking.
- 8) Common salt is obtained from sea water by: A. Evaporation.
- 9) Which of the following are methods of separating metallic substances? C. Use of magnet.
- 10) Name the separation method that causes wet clothes on a clothes line to dry: A. Evaporation.
These methods rely on the different physical properties of the substances involved. Filtration, for instance, is used to separate solids from liquids by passing the mixture through a barrier that allows only the liquid to pass through. Winnowing takes advantage of the wind to separate lighter husk from heavier grains, while Evaporation is a technique used to obtain solids from solutions by converting the liquid into vapor.
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