Class 12 Chemistry - Chapter Surface Chemistry NCERT Solutions | Give reason why a finely divided substan

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 Exercise 2, Question 3: give reason why a finely divided substance is more....
Question 3

Give reason why a finely divided substance is more effective as an adsorbent.

Answer

Adsorption is a surface phenomenon. The extent of adsorption depends on the surface area. Therefore, adsorption is directly proportional to the surface area.Increase in the surface area of the adsorbent, increases the total amount of gas adsorbed. A finely divided substance like nickel, platinum and porous substances like charcoal, silica gel provides large surface area. Both physisorption and chemisorption increase with an increase in the surface area. Hence, a finely divided substance behaves as a good adsorbent.

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