1

### JEE Main 2019 (Online) 9th January Evening Slot

The correct match between Item I and Item II is :

Item - I Item - II
(A) Benzaldehyde (P) Mobile phase
A
(A) $\to$ (Q); (B) $\to$ (P); (C) $\to$ (R)
B
(A) $\to$ (R); (B) $\to$ (Q); (C) $\to$ (P)
C
(A) $\to$ (Q); (B) $\to$ (R); (C) $\to$ (P)
D
(A) $\to$ (P); (B) $\to$ (R); (C) $\to$ (Q)

## Explanation

Activated Alumina(Al2O3) is aluminum oxide in the form of very porous spheres that is why its surface area is far greater than its weight, for that reason it is very good Adsorbent.

Most commonly used in moblie phase is Acetonitrile(CH3CN). liquid or gas that flows through a chromatography system is called mobile phase.
2

### JEE Main 2019 (Online) 9th January Evening Slot

The major product in the following reaction is :

A
B
C
D

## Explanation

Among this two resonating structure, negative charge on oxygen atom is more stable so this structure is more stable and will not react with aldehyde.
3

### JEE Main 2019 (Online) 9th January Evening Slot

The major product of the following reaction is :

A
B
C
D

## Explanation

4

### JEE Main 2019 (Online) 9th January Evening Slot

The major product of the following reaction is :

A
B
C
D