Question # 1

Which compound was recognized the parent member of aromatic compounds

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Aniline

Phenol

Benzene

Toluene

Which gas is produced by treating CaC₂with water

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Methane

Ethane

Acetylene

HCI

Alkyne is :

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CH_3-CH₃

CH₄

CH₂₌CH₂

C₂H₂

The empirical formula of benzene is determined by

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IR spectra

U.V

Elemental analysis

NMR spectra

Which of the following reaction is characteristic of benzene

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Electrophilic substitution reaction

Reduction

Oxidation

Ozonolysis

All are ortho & Para directing except

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X

OH

NR₃

NH₂

Ethylene can be prepared in the laboratory by heating together ethyl alcohol and

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HCI

Phenol

HF

H₂SO₄

Kolb's method is not useful for the production of

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Methane

Ethane

Propane

Butane

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

The reaction-method that does not give an alkane is

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Catalytic hydrogenation of alkanes

Wurtz reaction

Hydrolysis of alkyl magnesium bromide

Dehydrohalogenation of an alkyl halide

Benzene reacts with ozone and gives

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Glycerin

Glyoxal

Maleic anhydride

Benzoic acid

Which one of the following gases is used for artificial ripening of fruits

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Ethene

Ethane

Methane

Propane

During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be

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H₂SO₄

Ni

Fe₂O₃

Al₂O₃

Preparation of vegetable ghee involves

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Halogenations

Hydrogenation

Hydroxylation

Dehydrogenation

What is not a common use of methane

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As a fuel

For the preparation of haloaklanes

For the preparation of methyl alcohol

For the preparation of sulphuric acid

The stability of acromatic compounds decreases with ------- in the no. of its resonance structure

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Decrease

Increase

Remain constant

Partially decreases

Which of the following possesses the highest melting point?

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Chlorobenzene

0-Dichlorobenzene

m-Dichlorobenzene

p-Dichlorobenzene

Free radical mechanism of halogenation of alkanes follow step:

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Initiation

Propagation

Termination

All of these

Synthetic rubber is made by polymerization of

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Chloroform

Acetylene

Divinlacetylene

Butene

"Each different compound should have a different name" was published by IUPAC system of nomenclature in

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1892

1830

1947

1979

Benzene is obtained by fractional distillation of

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Heavy oil

Anthracene oil

Middle oil

Light oil

The benzene molecule contains

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Three double bonds

Two double bonds

One double bonds

Delocalizedπ-electron charge

Ethylene combines with water in the presence of H₂SO₄+ HgSO₄and forms

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Ethyle chloride

Ethyle alcohol

Carboxylic acid

None of these

Which of the following decolorized Br₂-water

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Methane

Ethane

Ethene

Propane

The order of dehydration of alcohol

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10> 20> 30

10> 30> 20

20> 30> 10

30> 20> 10

In which one of the following compound rings are not fused together at ortho positions

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Phenanthrene

Naphthalene

Diphenyemethane

Anthracene

The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with the rule

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Hund's rule

Markowvikov's rule

Pauli's exclusion principle

Auf ban principle

Alkanes are least reactive towards:

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Acids and bases

Reducing agents

Oxidizing agents

All of these

Acetylene is used in the manufacture of

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Rubber

Plastic

Ethyle alcohol

All of these

If we remove one hydrogen atom from an alkane we obtain a group called

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Acetyle group

Formyle group

Alkyle group

Ketyle group

The order of reactivity of halogen acids towards alkenes

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HCl > HBr > Hl

HBr > HCl > HI

HCl > HBr

HI > HBr > HCl

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