JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Activated charcoal is used to remove colouring matter from pure substances. It works by

(A)Oxidation
(B)Reduction
(C)Bleaching
(D)AdsorptionCorrect

Answer: (D)

Solution

Activated charcoal has an extremely large surface area, and the coloured impurity molecules are physically held on this surface by van der Waals' forces and removed along with the charcoal on filtration;

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Question ID VK-144687