Class 12 Chemistry - Chapter Surface Chemistry NCERT Solutions | Comment on the statement that "coll

Welcome to the NCERT Solutions for Class 12th Chemistry - Chapter Surface Chemistry. This page offers a step-by-step solution to the specific question from Excercise 2 , Question 27: comment on the statement that quot colloid is not....
Question 27

Comment on the statement that "colloid is not a substance but a state of substance".

Answer

Common salt (a typical crystalloid in an aqueous medium) behaves as a colloid in a benzene medium. Hence, we can say that a colloidal substance does not represent a separate class of substances. When the size of the solute particle lies between 10 nm and 100 nm, it behaves as a colloid.

Hence, we can say that colloid is not a substance but a state of the substance which is dependent on the size of the particle. A colloidal state is intermediate between a true solution and a suspension.

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