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Online Tests
ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons Online Test MCQs With Answers
Question # 1
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
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Question # 2
In CH
4
, all the H-C-H bond angles are
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120°
107°
109°
109.5°
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Question # 3
B-B'-dichloroethyl sulphide is commonly known as
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Mustard gas
Laughing gas
Phosgene gas
Bio gas
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Question # 4
Alkanes have functional group :
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----X
--OH
----COH
No functional group
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Question # 5
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 # 6
Ethylene combines with water in the presence of H
2
SO
4
+ HgSO
4
and forms
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Ethyle chloride
Ethyle alcohol
Carboxylic acid
None of these
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Question # 7
Raney - nickel is the alloy of Ni with
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Pt
Al
Cu
Pd
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Question # 8
Alkynes are colourless & odouless except
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Acetylene
Propyne
Butyne
Pentyne
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Question # 9
Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?
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Chlorination, nitration, reducing
Nitration, chlorination, reducition
Nitration, reduction,chlorination
Nitration, reduction, acylation, chlorination, hydrolysis
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Question # 10
Choose an answer
2, 3-dimethylbutane
2, 3-methylbutane
2-dimethylbutane
Dimethylbutane
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Question # 11
Which of the following is not an ortho-para directing group
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Question # 12
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 # 13
When alkyl is treated with chlorine in the presence of sunlight
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1,3 dichloroproduct is formed
1,4 dichloro product is formed
1,3,5 trichloro product is formed
Only alkyl group is substituted
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Question # 14
Benzene was discovered by Michael Faraday's in
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1824
1825
1826
1827
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Question # 15
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 # 16
The order of reactivity of halogens in aliphatic substitution reactions is
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Br2 > C12 > F2
C12 > Br2 > F2
C12 C12 > Br2
F2 > Br2 > C12
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Question # 17
The three alternate single and double bonds in the benzene ring are called
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Conjugate bonds
Resonating bonds
Both A and B
None of above
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Question # 18
Which of the following is not an electrophitic substitution reaction of benzene
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Nitration
Sulphonation
Fridel-Craft alkylation
Free radical chlorination of benzene
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Question # 19
Which compound was recognized the parent member of aromatic compounds
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Aniline
Phenol
Benzene
Toluene
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Question # 20
Polymerization of ethane take place at pressure of 100 atm and a temperature of
Choose an answer
200
°C
400
°C
600
°C
800
°C
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Question # 21
Benzene reacts with ozone and gives
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Glycerin
Glyoxal
Maleic anhydride
Benzoic acid
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Question # 22
In Friedal-Craft's alkylation besides AlCl3 the other reactants are
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C6H6 + NH3
C6H6 + NH4
C6H6 + CH3Cl
C6H6 + CH3COCl
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Question # 23
The C-C bond angles in benzene ring are
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119
°
120
°
121
°
None
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Question # 24
The sp
2
hybird orbitals are oriented in space at one angle
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180°
109.5°
100°
120°
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Question # 25
Which is the used as test for the presence of alkenes
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Reaction of cold dilute alkaline KMnO
4
Combustion
Polymerization
Catalytic hydrogenation
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Question # 26
Ethylene can be prepared in the laboratory by heating together ethyl alcohol and
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HCI
Phenol
HF
H
2
SO
4
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Question # 27
Benzene is obtained by fractional distillation of
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Heavy oil
Anthracene oil
Middle oil
Light oil
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Question # 28
"Each different compound should have a different name" was published by IUPAC system of nomenclature in
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1892
1830
1947
1979
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Question # 29
The process in which orbitals of different energies and shapes mix with each other to give equivalent hybrid orbitals is called
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Isomerization
polymerization
Hybridization
Resonance
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Question # 30
Synthesis of rubber is made by polymerization of
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Chloroform
Acetylene
Divinylacetylene
Butene
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