QJEEM19Chda6b: JEE Main 2019 Chemistry - Class 12 JEEM19Chda6b Solution: The correct match between Item I and Item II is : .tg…
| Item - I | Item - II | ||
|---|---|---|---|
| (A) | Benzaldehyde | (P) | Mobile phase |
| (B) | Alumina | (Q) | Adsorbent |
| (C) | Acetonitrile | (R) | Adsorbate |
Multiple Choice Options
- A (A) (Q); (B) (P); (C) (R)
- B (A) (R); (B) (Q); (C) (P)
- C (A) (Q); (B) (R); (C) (P)
- D (A) (P); (B) (R); (C) (Q)
Step-by-Step Verified Solution
To determine the correct match between Item I and Item II, let's analyze each item and its corresponding match :
1. Benzaldehyde: Benzaldehyde is an aromatic aldehyde, which is typically considered as an adsorbate in chromatography. An adsorbate is a substance that is adsorbed on a surface.
2. Alumina: Alumina (Aluminum oxide) is well known for its use as an adsorbent in chromatography processes. An adsorbent is a material that adsorbs another substance.
3. Acetonitrile: Acetonitrile is an organic solvent often used as a mobile phase in chromatography. The mobile phase is the phase that moves in chromatography, helping to carry the sample through the stationary phase.
Now, let's match the items :
| Item - I | Item - II | ||
|---|---|---|---|
| (A) | Benzaldehyde | (R) | Adsorbate |
| (B) | Alumina | (Q) | Adsorbent |
| (C) | Acetonitrile | (P) | Mobile phase |
Therefore, the correct match is :
(A) (R); (B) (Q); (C) (P)
This corresponds to Option B.