Question

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?

• A. (i) and (ii)
• B. (ii) and (iii)
• C. (ii) and (iv)
• D. (iv) only

Answer 1

The correct option is B

(ii) and (iii)

Explanation for correct option:

(b) (ii) and (iii)

• Because the mixture is made up of two separate constituents in various states, namely ghee and residue, these two procedures are the most appropriate.
• The filtration procedure is used to separate the mixture's granules from the liquid.
• Decantation is the process of separating fluid from concrete and other insoluble (non-mixing) liquids by eliminating the liquid layer on top from the solid or liquid layer beneath.

Explanation for incorrect options :

(a) (i) and (ii)

• The mixture is made up of two separate constituents in various states, namely ghee, and residue.
• evaporation cannot occur here as the liquid cannot be obtained as it is evaporated.

(c ) (ii) and (iv)

• The mixture is made up of two separate constituents in various states, namely ghee, and residue.
• churning can be used to make butter but not for separating butter from milk.
• Decantation is the process of separating fluid from concrete and other insoluble (non-mixing) liquids by eliminating the liquid layer on top from the solid or liquid layer beneath, it can be used to separate ghee and residue.

(d) (iv) only

• The mixture is made up of two separate constituents in various states, namely ghee, and residue.

• Churning can be used to make butter but not for separating butter from milk.

Therefore the correct option is (b) (ii) and (iii).