Question # 1

Effect of substituent on benzene ring is due to

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Resonance

Inductive effect

Both a and b

Neither a nor b

During Nitration of Benzene the active nitrating agent is

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NO₃

NO₂⁺

NO₂

HNO₃

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

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toluene

benzene

nitrobenzene

chlorobenzene

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

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-NO2

-Cl

-CH3

-OH

Phenol when distilled with zinc dust gives.

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Toluene

Benzaldehyde

Benzoic acid

Benzene

Chlorobenzene on nitration with conc. HNO3 and Conc. H2SO4 gives.

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m -chloronitrobenzene

o and p chloronitrobenzene

o and m chloronitrobenzene

mixture of O2 m and p chloronitrobenzene

Biphenyl is

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Monocyclic aromatic compound

Polyclic aromatic compound

Polycyclic fused ring compound

Alicyclic compound

Which of the following is Ortho and Para directing group

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-I

-CHO

-COR

-NH₂

The conversation of n-hexane into benzene by heating in in the presence of Pt is called

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Isomerization

Aromatization

Dealkylation

Rearrangement

Which catalyst is used Friedel Crafts reactions

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AlCl₃

BeCl₂

NaCl

HNO₃

The resonating contributing structures of Benzene are

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2

3

5

7

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

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-COOH

-NO

-CHO

-CH3

Main source of aromatic compound is

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Petroleum

Coaltar

Living organisms

Dead marine animals

Which makes a molecule more stable.

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Greater localization of pi electrons

Less delocalization of pi electrons

Greeter delocalization of pi electrons

Less delocalization for pi electrons

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

The compound which can not be nitrated easily.

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Benzene

Nitrobenzene

Phenol

Toluene

Cyclic structure of benzene was proposed by

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Dewar

Faraday

Down

Kekule

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