The correct match between Item I and Item II is:
Item I Item II
(A) Benzaldehyde (P) Mobile phase
(B) Alumina (Q) Adsorbant
(C) Acetonitrile (R) Adsorbate
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.
Benzaldehyde is adsorbate. Alumina behave as adsorbent. Acetonitrite work as mobile phase.