Question

which property of substances is used for separation by sieving

Answer 1

Sieving: When the size of particle it too small to be picked by hand or when the quantity is too large, sieving is used for separating substances. A sieve; having holes of proper size is used. The bigger particles are retained by the sieve whereas the smaller ones pass through it. For example; this method is used for separating bran from flour, sand from gravel, pearls of different sizes, etc.This method of separation of particles from a mixturebased on the difference in size of particles is known as sieving. It uses sieve plates for separation of coarse particles from finer particles

Answer 2

Sieving: When the size of particle it too small to be picked by hand or when the quantity is too large, sieving is used for separating substances.Husk or dirt particles can be separated by winnowing, being lighter they wall fly away from pulses.