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Chemistry Class 12 Chapter 9
Aromatic Hydrocarbons
Test 8
1.
The resonance energy of benzene is?
150.5KJ/mol
250.5Cal/mol
250.5KJ/mol
150.5Cal/mol
2.
Benzene is heated in air with vanadium pentaoxide it undergoes?
Elimination reaction
Substitution reaction
Addition reaction
Oxidation reaction
3.
In Friedel craft alkylation,AlCl
3
is used to generate?
Strong electrophile
Weak nucleophile
Strong nucleophile
Weak electrophile
4.
The preparation of benzene is also called?
Condensation
Dehydration
Oxidation
Polymerization
5.
Reaction of bromine with benzene in presence of light is?
No reaction occurs
Substitution
Destruction of benzene ring
Addition reaction
6.
When benzene is prepared from acetylene catalyst used is?
Organo-nickel
Reney nickel
AlCl
3
Zn amalgam
7.
Which compound readily undergoes sulphonation?
Benzene
Nitrobenzene
Chlorobenzene
Tolune
8.
Acetophenone is a?
Ketone
Quinine
None of these
Aldehyde
9.
Nitronium ion is?
NO
2
+
NO
NO
3
NO
2
+
10.
During sulphonation of benzene, H
2
SO
7
generates electropile?
H
2
S
HSO
4
-
SO
7
SO
2
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