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JEE MAIN - Chemistry (2019 - 9th January Evening Slot - No. 21)

The correct match between Item I and Item II is :

Item - I Item - II
(A) Benzaldehyde (P) Mobile phase
(B) Alumina (Q) Adsorbent
(C) Acetonitrile (R) Adsorbate
(A) $$ \to $$ (Q); (B) $$ \to $$ (P); (C) $$ \to $$ (R)
(A) $$ \to $$ (R); (B) $$ \to $$ (Q); (C) $$ \to $$ (P)
(A) $$ \to $$ (Q); (B) $$ \to $$ (R); (C) $$ \to $$ (P)
(A) $$ \to $$ (P); (B) $$ \to $$ (R); (C) $$ \to $$ (Q)

Explanation

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) $$\to$$ (R); (B) $$\to$$ (Q); (C) $$\to$$ (P)

This corresponds to Option B.

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