1
MCQ (Single Correct Answer)

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
MCQ (Single Correct Answer)

JEE Main 2018 (Online) 16th April Morning Slot

The major produced of the following reaction is :

A
B
C
D

Explanation

3
MCQ (Single Correct Answer)

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
MCQ (Single Correct Answer)

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.

Questions Asked from Hydrocarbons

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