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Why are powdered substances more effecti...

Why are powdered substances more effective adsorbents than their crystalline forms?

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Adsorption increases with increase of surface area of the adsorbent. Thus finely divided metals and porous substances having large surface area are good adsorbents. The surface area of the crystalline substances is less than their powdered forms.
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  10. What is the difference between physisorption and chemisorption?

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

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