Question # 1

_{Which compound is the most reactvie one:}

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benzene

ethene

ethane

ethyne

Kekule structures contributed towards actual structure of benzene

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60%

70%

80%

90%

The conversion of n-hexane into benzene by heating in the presence of Cr₂O_{3 is called:}

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Isomerization

Aromatization

Dealkylation

Rearrangment

Which compound is the most reactive one?

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benzene

ethene

ethane

ethyne

Kekule structures contributed towards actual structure of benzene

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60%

70%

80%

90%

Which of the following is explosive?

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Trinitrophenol

Nitrophenol

Nitromethane

Nitrobenzene

Aroma meas:

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Fragrant

Invisible

latest affinityt

benzene

Benzene acid can be prepared from the oxidation of:

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benzene

ethyl benzene

benzonic acid

toluene

Ozonolysis of benzene gives

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nitration

sulphonation

ozonide

glyoxal

The electrophile in aromatic sulphonation Is

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H₂SO₄

HSO₄^-

SO₃

SO₃⁺

The hydridization in benzene is

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sp³

sp²

sp⁴

dsp²

Which term was derived from "aroma":

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Atom

Hydrocarbons

aromatic

aliphatic

Which of the following acid can be used as a catalyst in Friedel Craft's reaction?

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AlCl₃

HNO₃

BeCl₂

NaCl

Ratio of carbon to hydrogen in aromatic compounds is

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Low than alkanes

High than alkanes

Low than alkenes not high than alkanes

High than high than alkenes

Empirical formula mass of benzene is times lesser than molecular formula mass

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four

five

six

seven

Benzene gives reactions generally

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electrophilic

addition substitution

synthesis

addition and electrophilic substitution

During nitration of benzene. the active nitrating agent is

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NO₃^-1

NO₂⁺

NO₂^-1

HNO₃

The hybirdization in benzene is:

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sp³

sp²

dsp²

The conversion of n-hexane into benzene by heating in the presence of CO, is called

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lsomerization

Aromatization

Dealkylation

Rearrangement

Ozonolysis of benzene gives:

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Nitration

sulphonation

ozonide

glyoxal

The benzene molecule contains

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Three double bond

Two double bond

One double bond

Delocalized pie electron charge

Among the following, poly cyclic compound is

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styrene

cumene

naphthalene

xylene

Bond angle in benzene is :

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109..5^o

180^o

120^o

107.2^o

Bond angle in benzene is

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109.5°

180°

120°

107.20

The benzene molecule contains:

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Three double bond

Two double bond

One double bond

DelocalizedᏘ electron charge

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

Benzene gives reactions generally:

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Electropholic subsitution

addition

synthesis

addition and electropholic subsitution

Monosubstituted benzene can have disubstitution at position

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ortho

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toluene

benzene

nitrobenzene

chlorobenzene

Ratio of carbon to hydrogen in aromatic compounds is:

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Low than alkanes

High than alkanes

Low than alkanes not high than alkanes

High than alkanes

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ECAT Chemistry Chapter 20 Aromatic Hydrocarbons Online Test MCQs With Answers

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