Question

Take a mixture of sand and salt. How will we separate these? We already saw

that hand picking would not be a practical method for separating these. Keep this

mixture in a beaker and add some water to it. leave the beaker aside for some

time. Do you see the sand settling down at the bottom? The sand can be

separated by the decantation or filtration. What does the decanted liquid contain?

Do you think this water contains the salt which was there in the mixture at the

beginning?

Now, we need to separate salt and water from the decanted liquid. transfer this

liquid to a kettle and close its lid. heat the kettle for sometime. Do you notice

steam coming out from the spout of the kettle? take a metal plate with some ice

on it. hold the plate just above the spout of the kettle. What do you observe? let

all the water in the kettle boil off.


Q57. By which method are methods send is separated in this activity?

a) Sedimentation b) evaporation c) filtration d) both a and c.


Q58. Salt is separated by ______ method in this activity.

a) sedimentation. b) evaporation c) filtration. d) both a and c.


Q59. Why is ice needed in this activity?

a) To separate salt b) to separate sand c) to recover water. d) none of​

Answer 1

Answer:

Q57. Sedimentation

Q58. Evaporation

Q59. none of above

Answer 2

Answer:

57)Sedimentation

58)Evaporation

59)None of the above

Explanation:

HOPE IT HELPS. :)