The substance that gets adsorbed on the surface of the solid is called.
Adsorbate
Adsorbent
Micelle
Inner phase
Adsorbate and Adsorbent -
The molecular species or substance, which concentrates or accumulates at the surface is termed adsorbate and the material on the surface of which adsorption takes place is called adsorbent.
Therefore, option number (1) is correct.