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JEE Main levelSingle correct optionDifficulty 2 of 3si088

A little activated charcoal is added to a hot aqueous solution of impure benzoic acid before hot filtration. Its purpose is to

  1. Aadsorb coloured impurities
  2. Breact with benzoic acid
  3. Clower the solubility of benzoic acid in water
  4. Dact as a seed for crystals

Answer: A

Activated charcoal has a large surface area and adsorbs coloured, high molar mass impurities. It is then removed by hot filtration together with other insoluble matter.
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