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Online Tests
ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons Online Test MCQs With Answers
Question # 1
Odour of alkene is:
Choose an answer
Fruity
Odourless
Zarlic like
Irritating
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Question # 2
Preparation of vegetable ghee involves
Choose an answer
Halogenations
Hydrogenation
Hydroxylation
Dehydrogenation
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Question # 3
Which is symmetric alkene?
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CH=C-CH
2
CH
≡CH
CH
3
-C
≡C - CH
3
B and C
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Question # 4
The Total coal resources of Pakistan are estimated to be
Choose an answer
184 billion
184 million tones
1.84 billion tounes
1.84 million tonnes
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Question # 5
How many molecules of chlorine adds in benzene in the presence of sunlight
Choose an answer
One
Two
Three
Four
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Question # 6
Eletronegativity difference in C-C bond in alkanes is:
Choose an answer
Zero
Double
Half
4.0
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Question # 7
The order of reactivity of halogens in aliphatic substitution reactions is
Choose an answer
Br2 > C12 > F2
C12 > Br2 > F2
C12 C12 > Br2
F2 > Br2 > C12
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Question # 8
The compound prepared by a substitution reaction of benzene is
Choose an answer
Acetophenone
Glyoxal
Cyclohexame
Hexabromo cyclohexane
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Question # 9
The difference between amount of heat actually released and that of calculated is called
Choose an answer
Bonding energy
Activation energy
Resonance energy
Transition energy
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Question # 10
Formula of chloroform is
Choose an answer
CH
3
CI
CCI
4
CH
2
CI
2
CHCI
3
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Question # 11
Benzene was discovered by Michael Faraday's in
Choose an answer
1824
1825
1826
1827
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Question # 12
Preparation of vegetable ghee involves:
Choose an answer
Halogenation
Hydrogenation
Hydroxylation
Dehydrogenation
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Question # 13
Which one of the following gases is used for artificial ripening of fruits
Choose an answer
Ethane
Ethyne
Methane
Propane
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Question # 14
β-
β- dichloroethyle sulphide is commonly known as:
Choose an answer
Mustared gas
Laughing gas
Phosgene gas
Bio gas
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Question # 15
A salt producing hydrocarbon among these compounds is
Choose an answer
Ehyne
Ethene
Methane
Ethane
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Question # 16
CnH
2n
is the general formula of
Choose an answer
Alkanes
Alkanes
alkynes
None of above
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Question # 17
Synthesis rubber is made by polymerization :
Choose an answer
Chloroform
Acetylene
Divinyl acetylene
Butene
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Question # 18
Benzene does not undergo
Choose an answer
Substitution reaction
Addition reaction
Oxidation reaction
Elimination reaction
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Question # 19
The correct order of reactivity of halogens with alkanes is
Choose an answer
l
2
> Br
2
> Cl
2
> F
2
l
2
> Cl
2
> F
2
> Br
2
F
2
> Cl
2
> l
2
> Br
2
F
2
> Cl
2
> Br
2
> l
2
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Question # 20
Ethylene combines with water in the presence of H
2
SO
4
+ HgSO
4
and forms
Choose an answer
Ethyle chloride
Ethyle alcohol
Carboxylic acid
None of these
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Question # 21
Hydrogenation of alkenes/alkynes inthe presence of Ni as catalyst at 3000°C result in the formation of corresponding alkanes. This reaction is known as
Choose an answer
Sabatier-senderens reaction
kolbes reaction
Cannizaro's reaction
Haloform reaction
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Question # 22
Th IUPAC name of the compound having formula (CH3) 3 C - CH = CH2 is
Choose an answer
1, 1-Dimethyl-3-butene
1,1,1-Trimethyl-3-propene
3,3,-Dimenthyl-1-butene
3,3,3,-Trimethyl-1-propene
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Question # 23
The nitration of benzene takes place when it is heated with a mixture of conc.HNO
3
and conc. H
2
SO
4
at 50
°C in ratio of
Choose an answer
1 : 2
1 : 1
1 : 3
2 : 1
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Question # 24
The hydrocarbon which is used as an illuminating agent
Choose an answer
Methane
Methene
Methyne
B & C
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Question # 25
During reaction of O
2
and alkenes, a product:
Choose an answer
Glycol
Epxide
Halohydrin
Ethylene glycol
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Question # 26
Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively
Choose an answer
Zinc dust and soda lime
Soda time and zinc dust
Zinc dust and sodium hydroxide
Soda lime and copper
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Question # 27
What is not a common use of methane
Choose an answer
As a fuel
For the preparation of haloaklanes
For the preparation of methyl alcohol
For the preparation of sulphuric acid
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Question # 28
Alkanes are gases :
Choose an answer
C
1
-C
4
C
5
-C
10
C
11
-C
15
C
10
-C
20
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Question # 29
A single benzene ring can have ______ ortho position maximally
Choose an answer
One
Two
Three
Four
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Question # 30
Which of the following is not an ortho-para directing group
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Question # 31
Benzene is obtained from benzene sulphonic acid by treating with
Choose an answer
HCl
NaOH
H
2
O
NaHCO
3
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