Question

Which of the following method is used when there is a difference in size and colour of desirable and undesirable constituents? *

( a) Handpicking
(b) Threshing
(c) Filtration
(d) Decantation

Answer 1

Handpicking

hope it's helps

Answer 2

Answer:

(a) Handpicking is the method used when there s difference in size and color of constituents.

Explanation:

• Handpicking is a process to separate slightly larger particles from mixture by hand. Example: picking or separating insects or pieces of stones from pulses or grains or rice.

• Threshing is hand beating against an object, treading or by holding the crop against a rotating drum with spikes or rasp bars. Ex: separating seeds from harvested stalks.

• Filtration is process in which solid particles in a liquid or gaseous fluid is removed by the use of filter medium. Ex: ACs use air filter to remove particles and sometimes chemicals.

• Decantation is a process for separation of mixtures of immiscible liquids or of a liquid or a solid mixture. Ex: oil and water or kerosene and water.