Question

A mixture of chalk powder can be removed from flour by sieving.

• A. True
• B. False

Answer 1

The correct option is B False

Sieving is used to separate a mixture with components of different sizes. The smaller particles pass through the sieve while the larger ones cannot.
Particles of chalk powder and flour are of similar sizes. So, both of these will pass through the sieve. Hence, they cannot be separated by sieving.