55 You might have observed the preparation of ghee from butter and cream at home. Which method(s) can be used to separate ghee from the residue?
(i)Evaporation (ii) Decantation
(iii) Filtration (iv) Churning
Which of the following combination is the correct answer?
55 You might have observed the preparation of ghee from butter and cream at home. Which method(s) can be used to separate ghee from the residue?
(i)Evaporation (ii) Decantation
(iii) Filtration (iv) Churning
Which of the following combination is the correct answer?
The correct option is D Only (iv)
Explanation for correct option:
(C)- (ii),(iv)
Churning: The process of separation of the lighter particles of a solid from a liquid is known as churning. It is also known as centrifugation.
Example: Separation of butter from milk or curd etc.
As butter is lighter and floats whereas liquid is heavier and settles down.
Decantation
Decantation: The process of transfer of clean liquid from one vessel to another vessel without disturbing the sedimented particles is known as decantation.
After churning the butter and liquid part are kept undisturbed for some time, and then the liquid part is separated with the help of decantation.
Explanation for incorrect options:
(i) Evaporation
The process of conversion of water into its vapour or liquid into a gas is called evaporation.
- It is used to get a solid substance that is dissolved in water or another liquid.
- For example: By using the principle of evaporation we get common salt from the seawater.
(iii) Filtration
Filtration is the process of separating insoluble particles from a liquid.
Example: A mixture of sand and water is separated using the filtering process.
Final answer: The correct answer is an option (C)
Only (iv)
Explanation for correct option:
(C)- (ii),(iv)
Churning: The process of separation of the lighter particles of a solid from a liquid is known as churning. It is also known as centrifugation.
Example: Separation of butter from milk or curd etc.
As butter is lighter and floats whereas liquid is heavier and settles down.
Decantation
Decantation: The process of transfer of clean liquid from one vessel to another vessel without disturbing the sedimented particles is known as decantation.
After churning the butter and liquid part are kept undisturbed for some time, and then the liquid part is separated with the help of decantation.
Explanation for incorrect options:
(i) Evaporation
The process of conversion of water into its vapour or liquid into a gas is called evaporation.
- It is used to get a solid substance that is dissolved in water or another liquid.
- For example: By using the principle of evaporation we get common salt from the seawater.
(iii) Filtration
Filtration is the process of separating insoluble particles from a liquid.
Example: A mixture of sand and water is separated using the filtering process.
Final answer: The correct answer is an option (C)
