The substance on whose surface adsorption takes place is called an _______ .

absorbent

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absorbate

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solute

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solvent

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Solution

The correct option is A absorbent
The substance on whose surface adsorption takes place is called an absorbent.
In other words, a substance which adsorbs another substance (adsorbate) on its surface is called an adsorbent.
For example, when hydrogen gas is adsorbed on the surface of Pt metal, hydrogen is called adsorbate and Pt is called adsorbent.

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