Question

Why is sieving not used to separate small stones from rice grains?

Answer 1

Sieving is a process by which fine particles are separated from bigger particles by using a sieve. It is used in flour mill or at construction sites. ... Pebbles and stones are removed from sand by sieving.

Answer 2

Explanation:

because esieving is used to seperate the substances which differ in their size . if the rice are smaller then stone then we can use sieving but winnowing is the best process to remove stones from rice.