Question

What is the settling down of the insoluble heavy solid particles in a solid-liquid mixture called?

• A. decantation
• B. sieving
• C. sedimentation
• D. winnowing

Answer 1

The correct option is C

sedimentation

The explanation for the correct option -

• Sedimentation is the process by which heavier impurities in a liquid, typically water, settle to the bottom of the container containing the mixture.
• This method of separation is used to separate the heavy suspended impurities from a liquid.

The explanation for the incorrect options -

• Option A is incorrect because the process of pouring the clear supernatant liquid without disturbing the sediment is called decantation. Hence, is the next step of sedimentation.
• Option B is incorrect because Sieving is a separation technique based on the difference in particle size. The sieve is responsible for retaining the larger particles. This method is used to separate a solid-solid or solid-liquid mixture.
• Option D is incorrect because the technique of separating light particles from heavy particles by using the flow of wind is known as winnowing. This technique is used to separate the solid-solid mixture.

Hence, Option C is the correct answer.