1

### JEE Main 2018 (Online) 15th April Evening Slot

When 2-butyne is treate with H2/Lindlar's catalyst, compound X is produced as the major product and when treated with Na/liq. NH3 it produces Y as the major product Which of the following statements is correct ?
A
X will have higher dipole moment and higher boiling point than Y.
B
Y will have higher dipole moment and higher boiling point than X.
C
X will have lower dipole moment and lower boiling point than Y.
D
Y will have higher dipole momet and lower boiling point than X.

## Explanation

Here dipole moment of Y = 0

cis-isomer(X) will have higher dipole moment and higher boiling point than trans (Y).
2

### JEE Main 2018 (Online) 16th April Morning Slot

The major produced of the following reaction is :

A
B
C
D

## Explanation

3

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

Which of the following compounds is not aromatic ?
A
B
C
D

## Explanation

Do not have (4n + 2) $\pi$ electron It has 4n$\pi$ electrons
So it is Anti aromatic.
4

### JEE Main 2019 (Online) 10th January Morning Slot

Which hydrogen in compound (E) is easily replaceable during bromination reaction in presence of light ?

A
$\beta$ $-$ hydrogen
B
$\alpha$ $-$ hydrogen
C
$\gamma$ $-$ hydrogen
D
$\delta$ $-$ hydrogen

## Explanation

Due to greater stability of allyl radical formed after replacement of $\gamma$-hydrogen in compound (E), allylic bromination can easily be taken place.