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ECAT Chemistry Chapter 20 Aromatic Hydrocarbons Online Test MCQs With Answers
Question # 1
Ratio of carbon to hydrogen in aromatic compounds is
Choose an answer
Low than alkanes
High than alkanes
Low than alkenes not high than alkanes
High than high than alkenes
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Question # 2
Bond angle in benzene is :
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109..5
o
180
o
120
o
107.2
o
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Question # 3
Which of the following is explosive:
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Trinitropheonal
Nitropheonal
Nitromethane
Nitrobenzene
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Question # 4
The benzene molecule contains
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Three double bond
Two double bond
One double bond
Delocalized pie electron charge
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Question # 5
Aromatic compounds burn with sooty flame cause:
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They have high percentage of hydrogan
They have ring structure
They have high percentage of carbon
They resist reaction with air
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Question # 6
Among the following, poly cyclic compound is
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styrene
cumene
naphthalene
xylene
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Question # 7
Monosubstituted benzene can have disubstitution at position:
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Ortho
meta
para
a, b, c
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Question # 8
Ozonolysis of benzene gives:
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Nitration
sulphonation
ozonide
glyoxal
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Question # 9
Which of the following acid can be used as a catalyst in Friedel Craft's reaction?
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AlCl
3
HNO
3
BeCl
2
NaCl
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Question # 10
Benzene acid can be prepared from the oxidation of:
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benzene
ethyl benzene
benzonic acid
toluene
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Question # 11
Which compound is the most reactvie one:
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benzene
ethene
ethane
ethyne
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Question # 12
Amongst the following, the compound that can be most readily sulphonated is:
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Toluene
Benzene
nitrobenzene
chlorobenzene
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Question # 13
Benzene gives reactions generally:
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Electropholic subsitution
addition
synthesis
addition and electropholic subsitution
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Question # 14
Acyiation of benzene to produce aliphatic aromatic ketones is known as
Choose an answer
Friedel Craft's reaction
benzenecondensation
hydroformylation
Clemmensen reduction
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Question # 15
Benzene was discovered by first of all
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Michael Faraday
Hofmann
Ainderson
Sorenbon
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Question # 16
Resonance energy of benzene is (in KJ mol
-1
)
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120
150
170
180
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Question # 17
empirical formula mass of benzene is time lesser than moleculer formula mass:
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four
five
six
seven
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Question # 18
Simple aromatic compound is:
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benzene
toluene
aniline
phenol
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Question # 19
Benzene was discovered by first of all:
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Micheal Faraday
Hofmann
Ainderson
Sorenbon
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Question # 20
Which term was derived from atomos?
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atom
hydrocarbon
aromatic
aliphatic
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Question # 21
Amongst the following, the compound that can be most readily sulphonated is
Choose an answer
toluene
benzene
nitrobenzene
chlorobenzene
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Question # 22
Benzene gives reactions generally
Choose an answer
electrophilic
addition substitution
synthesis
addition and electrophilic substitution
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Question # 23
Ozonolysis of benzene gives
Choose an answer
nitration
sulphonation
ozonide
glyoxal
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Question # 24
The benzene molecule contains:
Choose an answer
Three double bond
Two double bond
One double bond
Delocalized
Ꮨ electron charge
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Question # 25
Benzene cannot undergo
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substitution reactions
addition reactions
oxidation reactions
elimination reactions
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Question # 26
During nitration of benzene, the active nitrating agent is:
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NO
3
-1
NO
2+
NO
2
-1
HNO
3
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Question # 27
Which of the following is explosive?
Choose an answer
Trinitrophenol
Nitrophenol
Nitromethane
Nitrobenzene
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Question # 28
Ratio of carbon to hydrogen in aromatic compounds is:
Choose an answer
Low than alkanes
High than alkanes
Low than alkanes not high than alkanes
High than alkanes
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Question # 29
Which is the property of benzene:
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Decolourizes KMnO
4
straight chain structure
only double bond is present
triple and double bond
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Question # 30
Aromatic compounds burn with sooty flame cause
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They have high percentage of hydrogen
They have a ring structure
They have high percentage of carbon
They resist reaction with air
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