Pick out the statement which is not relevant | vedclass

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(A) The statement which is not relevant in the discussion of colloids is $A$. Sodium aluminium silicate is used in the softening of hard water,which i

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Sodium aluminium silicate is used in the softening of hard water.

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(A) The statement which is not relevant in the discussion of colloids is $A$. Sodium aluminium silicate is used in the softening of hard water,which is a process based on ion exchange (zeolite process),not on colloidal properties. $B$ is relevant as alum acts as a coagulant. $C$ is relevant as it involves the coagulation of colloidal water droplets in clouds. $D$ is relevant as it involves the coagulation of colloidal clay particles by sea water.

Pick out the statement which is not relevant in the discussion of colloids.

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