Question # 1

During nitration of benzene, the active nitrating agent is

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NO₃

NO₂⁺

NO₂^-

HNO₃

Main source of aromatic compound is

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Petroleum

Coaltar

Living organisms

Dead marine animals

Amongst the following, the compound that can be most readily sulphonated is

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toluene

benzene

nitrobenzene

chlorobenzene

Benzene cannot undergo

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Substitution reactions

addition reactions

oxidation reactions

elimination reactions

Aromatic hydro carbon are the derivatives of

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Normal series of paraffins

Alkene

Benzene

Cyclohexane

Which compound is the more reactive

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Benzene

Ethene

Ethane

Ethyne

Which group when attached with benzene increases electron density of ring.

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-COOH

-NO

-CHO

-CH3

Phenol when distilled with zinc dust gives.

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Toluene

Benzaldehyde

Benzoic acid

Benzene

Which catalyst is used Friedel Crafts reactions

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AlCl₃

BeCl₂

NaCl

HNO₃

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

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AlCl₃

HNO₃

BeCl₂

NaCl

Benzene can not undergo.

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Substitution reactions

Addition reactions

Oxidation reactions

Elimination reactions

Aromatic compounds burns with sooty flame because.

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They have high percentage of hydrogen

The have a right structure

The have high percentage of carbon

The resist reaction with air

Amongst the following, the compound of that can be most readily sulphonated is

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Toluene

Benzene

Nitro-benzene

Chloro-benzene

Which one of the following species is meta director if present at benzene ring.

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-NO2

-Cl

-CH3

-OH

The number of possible isomers of xylene are

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2

3

4

5

Which one is not a meta directing group

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-COOH

-CHO

-COR

-NH₂

The difference of actual and theoretical heat of hydrogenation of compound is called.

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Lattice energy

Resonance energy

Ionization energy

Enthalpy of formation

Which compound is the most reactive one

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benzene

ethene

ethane

ethyne

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