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Online Tests
ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons Online Test MCQs With Answers
Question # 1
The method used only for the production of symmetrical alkanes
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Kolb's method
Clemmenen
Cannizzaro
Wolf kishner
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Question # 2
acetylene can be converted into-while passing through a Cu-tube at 300
°C:
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Glyoxal
Vinyl acetylene
Vinyl alcohol
Benzene
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Question # 3
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
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Question # 4
Benzene does not undergo
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Substitution reaction
Addition reaction
Oxidation reaction
Elimination reaction
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Question # 5
Nitroalkane are used in
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Fuel
Solvents
Organic synthesis
All of them
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Question # 6
Toluene is also called
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Hydroxyl benzene
Methyl benzene
ethyl benzene
None
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Question # 7
All C - H bond lengths of benzene ring is
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1.07A
°
1.09A
°
1.08A
°
None
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Question # 8
Kolb's method is not useful for the production of
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Methane
Ethane
Propane
Butane
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Question # 9
Alkene general formula :
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C
n
H
2n+2
C
n
H
2n
C
n
H
2n-2
C
n
H
2n+1
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Question # 10
Substitution of halogen in the benzene ring requires catalyst
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AlCl
3
FeCl
3
SiO
2
Organo - nickel
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Question # 11
The four bonds of carbon in methane are directed towards the corners of
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Cube
Pentagon
Hexagon
Tetrahedron
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Question # 12
How many isomeric disubtituted products are obtained by the introducing of second group in the ring
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Two
Three
Four
None
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Question # 13
The temp. used for the hydrogenation of alkenes using Ni is
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2000°C
400°C
200-- 300°C
1000°C
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Question # 14
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
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Question # 15
An alkynes having Carbon count of 20 is
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gas
liquid
Solid
None
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Question # 16
Synthesis of rubber is made by polymerization of
Choose an answer
Chloroform
Acetylene
Divinylacetylene
Butene
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Question # 17
Which one of the following gases is used for artificial ripening of fruits
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Ethane
Ethyne
Methane
Propane
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Question # 18
Which is liquid among the following alkenes?
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Ethane
Propene
Butene
Pentene
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Question # 19
The method in which alkanes prepared by alkyle halides in the presence of palladium - charcoal is
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Hydrolysis
Electrolysis
Hydrogenation
Hydrogenolysis
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Question # 20
To differentiate isomers we use
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n-
iso-
neo
All of them
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Question # 21
Ethylene polymerizes at 100 atm pressure and 400°C to give
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Polybenzene
Polyalcohol
Polypropylene
Polyethylene
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Question # 22
The general formula of alkane is
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C
n
H
2n+2
C
n
H
n
C
n
H
2n
C
2
H
2n-1
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Question # 23
Which class of compound is more reactive
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Alkane
Alkene
Alkyne
None
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Question # 24
Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes
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2
1
3
4
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Question # 25
Acetylene is used in the manufacture of
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Rubber
Plastic
Ethyle alcohol
All of these
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Question # 26
Which is more active ?
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Alkanes
Alkenes
Alkynes
Benzene
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Question # 27
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
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Question # 28
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
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Question # 29
Benzene does not undergo polymerization and it is also resistant to
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Reduction
Oxidation
Alkylation
Ozonolysis
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Question # 30
Octane number is zero for
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n-Heptane
Isooctane
n-Hexane
Isoheptane
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Question # 31
Free radical mechanism of halogenation of alkanes follow step:
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Initiation
Propagation
Termination
All of these
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