Question

Sand and saw dust cannot be separated by hand picking. Why?​

Answer 1

Explanation:

1 Answer. (a) Because in hand picking method substances should be large enough in size to be recognized and picked out by hand but sand and saw dust particles are very small in size so they can't be picked by hand. It can be separated by filtration.

Answer 2

Answer:

Sand and sawdust cannot be separated by hand picking.

Explanation:

These both are very minute and can be separated only by putting in water. The sawdust will float on water and sand will sink.