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Question 890009
JEE Chemistry · Medium

Surface Chemistry: Mixed MCQ

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MixedMediumQuestion 890009

Question

Peptisation is the process of:
  1. A
    Converting a precipitate into a colloid by addition of electrolyte (peptising agent)
    Correct
  2. B
    Coagulating a colloid
  3. C
    Forming a true solution
  4. D
    Filtering a colloid

Correct answer

Converting a precipitate into a colloid by addition of electrolyte (peptising agent)

Explanation

Peptisation: a freshly prepared precipitate is converted into a colloid by adding a small amount of electrolyte (peptising agent) that is adsorbed on the particles, giving them charge → repulsion stabilises the colloid. E.g., AgCl precipitate + AgNO₃ → AgCl sol.

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