Chapter 3: Separation of substances

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Q
Separation of substances

Question:

True or false?

(a) A mixture of milk and water can be separated by filtration.

(b) A mixture of powdered salt and sugar can be separated by the process of winnowing.

(c) Separation of sugar from tea can be done with filtration.

(d) Grain and husk can be separated with the process of decantation.

Answer:

(a) A mixture of milk and water can be separated by filtration. (False)

Correct answer: In the filtration process, the liquid will pass through the paper while the solid will remain on the filter paper. Here, both milk and water are liquids so, they can not be separated by using the filtration process.

 

(b) A mixture of powdered salt and sugar can be separated by the process of winnowing. (False)

Correct answer: Winnowing is the method of separation of heavier and lighter components of a mixture by wind or by blowing air. Both salt and sugar are heavier particles, so they cannot be separated by winnowing.

 

(c) Separation of sugar from tea can be done with filtration. (False)

Correct answer: In the filtration process, the liquid will pass through the paper while the solid will remain on the filter paper. Here, sugar is completely soluble in tea, so it can not be separated by using the filtration process.

 

(d) Grain and husk can be separated with the process of decantation. (False)

Correct answer: Decantation is used to separate insoluble solid components from liquid components. So, grain and husk are solid particles and they cannot be separated by using the decantation technique.


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