Question

Substances with different densities can be separated by

• A. Filtration
• B. Decantation
• C. Centrifugation
• D. Winnowing

Answer 1

The correct option is C

Centrifugation

Explanation for correct answer: (C) Centrifugation:

• Centrifugation is used to separate lighter substances from heavier ones by churning the liquid mixture at high speed.
• Substances are separated based on density difference.
• Example: butter from milk.

Explanation for incorrect answers:

(A) Filtration: It is used to separate insoluble solids from a liquid mixture by using a filter.

(B) Decantation: It is the process of separating the top layer of a liquid by pouring it out, after the solids have settled at the bottom.

(D) Winnowing: It is the process of separating the heavier and lighter components of a mixture with the help of wind.

Thus, the correct answer is (C) Centrifugation.