CHECKPOINT 1
Which method should be used to separate:
1. grass from a bunch of spinach leaves?
2. stone pieces from a bowl of wheat?
3. dead insects from flour?
4. pieces of paper from cardboard pieces?
5. pebbles from sand?
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6th
Chemistry
Separation of Substances
More Than One Method of Separation
Explain the method that can...
CHEMISTRY
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Asked on November 22, 2019 by
Paramesh Subramoniam
Explain the method that can be used for separating the following mixture:
(i) Sand and husk
(ii) Wheat, sugar, and silk
(iii) Water and petrol
(iv) Rice and salt
(v) Sand and salt.
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ANSWER
(i) Mixture of sand and husk: Sand and husk can be separated by the method of winnowing.
(ii) Mixture of wheat, sugar and silk: For separating silk from the mixture we should follow the winnowing method because silk is lighter than other two components and get separated. Wheat and sugar can be separated by sieving because they are in different sizes.
(iii) Mixture of water and petrol: Water does not dissolve in petrol. So, it can be separated by the use of separating funnel.
(iv) Mixture of rice and salt: Rice and salt can be separated by sieving.
(v) Mixture of sand and salt: Sand and salt is mixed with water, salt dissolves in water and sand can be separated solution by sedimentation and decantation followed by filtration. After that using evaporation common salt is separated.
Answer:
1. Hand Picking
2.Sieving
3.sieving
4.Winnowing
5.Sieving