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Question: Answered & Verified by Expert
Pick out the statement which is not relevant in the discussion of colloids
ChemistrySurface ChemistryCOMEDKCOMEDK 2013
Options:
  • 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 electrified sand on the clouds from an aeroplane.
  • D deltas are formed at a place where the river pours its water into the sea.
Solution:
1732 Upvotes Verified Answer
The correct answer is: sodium aluminium silicate is used in the softening of hard water.
The statement that, sodium aluminium silicate is used in softening of hard water is not relevant with colloids.
It is a substitution reaction of calcium salts with zeolite.

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