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Pich out the statement which is not rele...

Pich out the statement which is not relevant in the discussion of colloids

A

sodium aluminium silicate is used in the softening of hard water

B

potash alum is used in shaving rounds and as a styptic in medicine

C

artificial rain is caused by throwing electrificied sand on the clouds from an aeroplane

D

deltas are formed at a place where the river pours its water into the sea.

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The correct Answer is:
A
Sodium aluminium silicate is used in the softening of hard water.
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