MolSynapse
question bank
All chapters
NEET
JEE
Practice
MolSynapse
/
Question bank
/
Haloalkanes and Haloarenes
/
Reactions of aryl halides
JEE Main level
Single correct option
Difficulty 2 of 3
hx097
Iodobenzene is heated with copper powder. The main product is
A
diphenyl ether
B
phenol
C
benzene
D
biphenyl
Answer: D
This is the Ullmann reaction, in which copper couples two aryl halide molecules:
2
C
X
6
H
X
5
I
+
2
Cu
C
X
6
H
X
5
−
C
X
6
H
X
5
+
2
CuI
. The product is biphenyl.
Practice Haloalkanes and Haloarenes
More on Reactions of aryl halides
Previous question
Next question
More questions on Reactions of aryl halides
Nitration of chlorobenzene with a mixture of conc. HNO3 and conc. H2SO4 gives mainly
NEET level
Arrange the following in increasing order of reactivity toward aqueous NaOH (nucleophilic aromatic substitution).
JEE Main level
Bromobenzene and bromoethane are treated with sodium in dry ether. The main cross-coupled product is
JEE Main level
The experimental dipole moments are about 2.2 D for cyclohexyl chloride and 1.7 D for chlorobenzene. The best explanation of the lower value...
JEE Main level
The melting points of the dichlorobenzenes are about 256 K for the ortho, 249 K for the meta and 326 K for the para isomer. The reason for t...
JEE Main level
For the SNAr reaction of 1-X-2,4-dinitrobenzene with sodium methoxide in methanol under identical conditions, the most reactive compound is ...
JEE Main level