Which one of the following is a case of negative adsorption?

Acetic acid solution in contact with animal charcoal

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Dilute

K C l

solution in contact with blood charcoal

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Concentration

K C l

solution in contact with blood charcoal

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H_{2}

gas in contact with charcoal at

300 K

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Solution

The correct option is B Dilute $K C l$ solution in contact with blood charcoal
When the concentration of the adsorbate is less on the surface as compared to its concentration in the bulk is called negative adsorption. In this adsorption, the concentration of dilute $K C l$ solution is less on the surface of blood charcoal as compare to its concentration in solution.

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