Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Thin layer chromatography is an adsorption chromatography.
Reason R: A thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent.
In the light of the above statements, choose the correct answer from the options given below
Assertion A: Thin layer chromatography is an adsorption chromatography.
Reason R: A thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent.
In the light of the above statements, choose the correct answer from the options given below
- (A)Both A and R are true and R is the correct explanation of A✓ Correct
- (B)Both A and R are true but R is NOT the correct explanation of A
- (C)A is true but R is false
- (D)A is false but R is true
Answer: (A)
Solution
Thin layer chromatography (TLC) is indeed an adsorption chromatography technique where separation occurs based on differential adsorption of components on a stationary phase. In TLC, a thin layer (~0.2 mm) of an adsorbent such as silica gel or alumina is coated on a glass plate, and this adsorbent layer is responsible for the separation. Both statements are true, and R correctly explains why TLC is classified as adsorption chromatography (the silica gel acts as the adsorbent). Therefore, both A and R are true and R is the correct explanation of A.
JEE Main · 2022 · 28 Jul 2022 · Shift 2 · Single correct option