Question # 1

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

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-NO2

-Cl

-CH3

-OH

Effect of substituent on benzene ring is due to

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Resonance

Inductive effect

Both a and b

Neither a nor b

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

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

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Toluene

Benzene

Nitro-benzene

Chloro-benzene

Biphenyl is

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Monocyclic aromatic compound

Polyclic aromatic compound

Polycyclic fused ring compound

Alicyclic compound

When acetylene is heated at 300 ^oC in copper tube, the product obtained is.

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Benzene

Alkyl benzene

Ether

Alcohol

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

Phenol when distilled with zinc dust gives.

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Toluene

Benzaldehyde

Benzoic acid

Benzene

Among the following the compound that can be most readily suphonted is.

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Toluene

Benzene

Nitrobenzene

Chlorobenzene

m-choronitro benzene is prepared by

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Nitration of chlorobenzene

Nitration of Benzene

Chlorination of Nitrobenzene

Nitration of m-chlorobenzene

During Nitration of Benzene the active nitrating agent is

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NO₃

NO₂⁺

NO₂

HNO₃

Structure of benzene is

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Tetrahedral

Trigonal planar

Hexagonal planar

Linear

Cyclic structure of benzene was proposed by

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Dewar

Faraday

Down

Kekule

Which compound is the more reactive

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Benzene

Ethene

Ethane

Ethyne

During nitration of benzene, the active nitrating agent is

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NO₃

NO₂⁺

NO₂^-

HNO₃

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

The conversion of benzene to chlorobenzene is a

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Addition reaction

Elimination reaction

Substitution reaction

Dehydration process

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