JEE Main · 2024 · 04 Apr 2024 · Shift 2 · Surface Chemistry

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The adsorbent used in adsorption chromatography is/are
A. silica gel
B. alumina
C. quick lime
D. magnesia

Choose the most appropriate answer from the options given below :

(A)B only
(B)C and D only
(C)A and B only✓ Correct
(D)A only

Answer: (C)

Solution

Silica gel and alumina are polar solid adsorbents whose surface silanol/hydroxyl groups adsorb polar analytes — these are the standard stationary phases used in adsorption chromatography. Quicklime (CaO) and magnesia (MgO) are not used this way. So A and B only.

JEE Main · 2024 · 04 Apr 2024 · Shift 2 · Single correct option

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