Question # 1

The method used only for the production of symmetrical alkanes

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Kolb's method

Clemmenen

Cannizzaro

Wolf kishner

acetylene can be converted into-while passing through a Cu-tube at 300°C:

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Glyoxal

Vinyl acetylene

Vinyl alcohol

Benzene

For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to

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Hydrolysis

Oxidation

Hydrogenation

Electrolysis

Benzene does not undergo

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Substitution reaction

Addition reaction

Oxidation reaction

Elimination reaction

Nitroalkane are used in

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Fuel

Solvents

Organic synthesis

All of them

Toluene is also called

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Hydroxyl benzene

Methyl benzene

ethyl benzene

None

All C - H bond lengths of benzene ring is

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1.07A°

1.09A°

1.08A°

None

Kolb's method is not useful for the production of

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Methane

Ethane

Propane

Butane

Alkene general formula :

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C_nH_2n+2

C_nH_2n

C_nH_2n-2

C_nH_2n+1

Substitution of halogen in the benzene ring requires catalyst

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AlCl₃

FeCl₃

SiO₂

Organo - nickel

The four bonds of carbon in methane are directed towards the corners of

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Cube

Pentagon

Hexagon

Tetrahedron

How many isomeric disubtituted products are obtained by the introducing of second group in the ring

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Two

Three

Four

None

The temp. used for the hydrogenation of alkenes using Ni is

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2000°C

400°C

200-- 300°C

1000°C

Most common reactions of benzene and its derivatives are

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electrophilic addition reactions

electrophilic substitution reactions

Nucleophilic addition reactions

Nucleophilic subtitution reactions

An alkynes having Carbon count of 20 is

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gas

liquid

Solid

None

Synthesis of rubber is made by polymerization of

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Chloroform

Acetylene

Divinylacetylene

Butene

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

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Ethane

Ethyne

Methane

Propane

Which is liquid among the following alkenes?

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Ethane

Propene

Butene

Pentene

The method in which alkanes prepared by alkyle halides in the presence of palladium - charcoal is

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Hydrolysis

Electrolysis

Hydrogenation

Hydrogenolysis

To differentiate isomers we use

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n-

iso-

neo

All of them

Ethylene polymerizes at 100 atm pressure and 400°C to give

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Polybenzene

Polyalcohol

Polypropylene

Polyethylene

The general formula of alkane is

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C_nH_2n+2

C_nH_n

C_nH_2n

C₂H_2n-1

Which class of compound is more reactive

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Alkane

Alkene

Alkyne

None

Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes

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2

1

3

4

Acetylene is used in the manufacture of

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Rubber

Plastic

Ethyle alcohol

All of these

Which is more active ?

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Alkanes

Alkenes

Alkynes

Benzene

Preparation of ethylbenzene by the reaction of bromobenzene, ethylbromide and sodium is called

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Wurtz reaction

Fitting reaction

Wurtz fitting reaction

None of these

When n-hexane is heated in the presence of Pt at 500°C, it cyclists to give

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Benzene

Cyclohexene

Benzene

Toluene

Benzene does not undergo polymerization and it is also resistant to

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Reduction

Oxidation

Alkylation

Ozonolysis

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

Free radical mechanism of halogenation of alkanes follow step:

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Initiation

Propagation

Termination

All of these

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ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons Online Test MCQs With Answers

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