Question

Pick 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 electrified sand on the clouds from an aeroplane
(d) Deltas are formed at a place where the river pours its water into the sea

Answer 1

i think it might be .....first one (a)
because washing soda is used for softening hard water... while aluminium silicate is used as an antacid

Answer 2

Answer:

The statement which is not relevant in the discussion of colloids is " Sodium aluminium silicate is used in the softening of hard water."

Explanation:

In all the below given statements the statement which does not relate to the discussion of colloids is Sodium aluminium silicate is used in the softening of hard water.

This is so because Colloids have no role in softening of hard water.