Given below are two statements :
Statement I : Emulsions of oil in water are unstable and sometimes they separate into two layers on standing.
Statement II : For stabilisation of an emulsion, excess of electrolyte is added.
In the light of the above statements, choose the most appropriate answer from the options given below :
Solution
Oil in water emulsions can sometimes separate into
two layers on standing.<br/><br/>
The most relevant example for the above case is
milk, which can separate into two layers on
standing for a longer time. Therefore, statement (I)
is correct.<br/><br/>
On adding excess of electrolyte, coagulation occurs
and emulsion is further destabilised.<br/><br/>
Therefore, statement (II) is incorrect.
About this question
Subject: Chemistry · Chapter: Surface Chemistry · Topic: Adsorption
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