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Question

Impure black coloured solution of acetic acid is added to activated charcoal and is heated for a while. The colour of acetic acid changes to its purest form as the impurities are absorbed by activated charcoal. Which of the following characteristics of coal absorbs the impurity?
  1. Tough
  2. Grey in colour
  3. Porous
  4. Suffocating smell


Solution

The correct option is C Porous
Activated charcoal is porous in nature, i.e., it acts as a sponge and absorbs anything with which it comes in contact with. Hence when impure black coloured solution of acetic acid is added to activated charcoal, the impurities are absorbed by activated charcoal thus leaving the solution colourless.

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