which of the following methods are used for separation of substance?
a) remove pebbles from the sand
b) remove pebbles from grain at home
c) separate husk from grain in agriculture
d) separate the seeds from the crop stalks
please answer if you know.
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Answer:
according to your question
The answer is :- c) separate husk from grain in agriculture
Explanation:
Handpicking, winnowing, sieving, sedimentation, decantation and filtration are some of the methods of separating substances from their mixtures. Husk and stones could be separated from grains by handpicking. Husk is separated from heavier seeds of grain by winnowing.
These are some more methods which are used for separation of substances.
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Answer:-
a) Removing of pebbles from the sand - Hand picking
Hand picking is the process by which the particles of same size , colour and shape are separated or removed by hand.
b) Removing pebbles from grains at home - Hand picking
These are also separated by hand picking.
c) Seperation of husk from grains in agriculture - Winnowing
When a mixture is allowed to drop from certain height then light weight particles are blown away by air and heavily weighed particles are settled at the ground. This process is called winnowing.
d) Seperation of seeds from crop stalks - Threshing
Some crops are thrashed against a rock , to separate seeds from them. This process is called Threshing.