Question # 1

Which catalyst is used Friedel Crafts reactions

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AlCl₃

BeCl₂

NaCl

HNO₃

Which one is not electrophile

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BF3

SO3

AlCl3

NH3

Phenol when distilled with zinc dust gives.

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Toluene

Benzaldehyde

Benzoic acid

Benzene

Which of the following is Ortho and Para directing group

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-I

-CHO

-COR

-NH₂

Benzene cannot undergo

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Substitution reactions

addition reactions

oxidation reactions

elimination reactions

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

Effect of substituent on benzene ring is due to

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Resonance

Inductive effect

Both a and b

Neither a nor b

Which one is not a meta directing group

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-COOH

-CHO

-COR

-NH₂

Benzene molecule is made up of.

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3- pi and 9 sigma bonds

6- pi and 6 sigma bonds

6 -pi and 12 sigma bonds

4 -pi and 12 sigma bonds

Aromatic hydro carbon are the derivatives of

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Normal series of paraffins

Alkene

Benzene

Cyclohexane

The aromatic ring of Benzene can be hydrogenated in the presenc eof.

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Pt

Rh

Sunlight

O3

The structure of Benzene is

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Hexagonal irregular

Tetrahedral

Trigonal planner

Hexagonal planner

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

Benzene can not undergo.

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Substitution reactions

Addition reactions

Oxidation reactions

Elimination reactions

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

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Toluene

Benzene

Nitro-benzene

Chloro-benzene

The resonating contributing structures of Benzene are

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2

3

5

7

Aromatic hydrocarbons are the derivatives of

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Normal series of paraffins

Alkene

Benzene

Cyclohexane

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