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Online Tests
ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons Online Test MCQs With Answers
Question # 1
Vinyl acetylene combines with HCl to form:
Choose an answer
Polyacetylene
Benzene
Chloroprene
Divinyl acetylene
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Question # 2
Which can be used for dehydration of alcohol
Choose an answer
P
4
O
10
H
2
SO
4
H
3
PO
4
All of them
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Question # 3
Alkynes are colourless & odouless except
Choose an answer
Acetylene
Propyne
Butyne
Pentyne
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Question # 4
Octane number can be changed by
Choose an answer
Isomerisation
Alkylation
Cyclisation
All of these
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Question # 5
Aromatic hydrocarbons are the derivatives of
Choose an answer
Normal series of paraffins
Alkene
Benzene
Cyclohexane
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Question # 6
Which one of following is not monocyclic aromatic hydrocarbon
Choose an answer
Benzaldehyde
Benzoic acid
Benzene sulfonic acid
Biphenyl
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Question # 7
Preparation of vegetable ghee involves
Choose an answer
Halogenations
Hydrogenation
Hydroxylation
Dehydrogenation
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Question # 8
Meta directing group decreased the ----------- of benzene ring
Choose an answer
Physical activity
Chemical reactivity
Density
None
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Question # 9
In Friedal-Craft's alkylation besides AlCl3 the other reactants are
Choose an answer
C6H6 + NH3
C6H6 + NH4
C6H6 + CH3Cl
C6H6 + CH3COCl
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Question # 10
Synthesis of rubber is made by polymerization of
Choose an answer
Chloroform
Acetylene
Divinylacetylene
Butene
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Question # 11
The elimination of HX from adjacent carbon atoms is called
Choose an answer
Halogenations
Hydrohalogenation
Dehydrohalogenation
Hydration
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Question # 12
The reaction-method that does not give an alkane is
Choose an answer
Catalytic hydrogenation of alkanes
Wurtz reaction
Hydrolysis of alkyl magnesium bromide
Dehydrohalogenation of an alkyl halide
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Question # 13
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 # 14
Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?
Choose an answer
Chlorination, nitration, reducing
Nitration, chlorination, reducition
Nitration, reduction,chlorination
Nitration, reduction, acylation, chlorination, hydrolysis
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Question # 15
The empirical formula of benzene is determined by
Choose an answer
IR spectra
U.V
Elemental analysis
NMR spectra
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Question # 16
To differentiate isomers we use
Choose an answer
n-
iso-
neo
All of them
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Question # 17
Which of the following decolorized Br
2
-water
Choose an answer
Methane
Ethane
Ethene
Propane
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Question # 18
Choose an answer
2-bromonitrobenzene
2-nitrobromobenzene
1-bromonitrobenzene
1-nitrobromobenzene
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Question # 19
The next homologue of C
10
H
22
will be
Choose an answer
C
9
H
20
C
12
H
26
C
11
H
24
C
13
H
28
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Question # 20
Which of the following reaction is characteristic of benzene
Choose an answer
Electrophilic substitution reaction
Reduction
Oxidation
Ozonolysis
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Question # 21
The molecule of ethane possess which hybrization
Choose an answer
sp
3
sp
2
sp
sp
2
d
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Question # 22
The presence of a double bond in a compound in the sign of:
Choose an answer
Saturation
Unsaturation
Subsitution
None
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Question # 23
Sp
3
hybird orbitals are oriented at an angle of
Choose an answer
107.5°
108.5°
109.5°
103.5°
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Question # 24
An organic compound, on treatment with Br2 in CC14 gives bromoderivative of an alkene. The compound will be
Choose an answer
CH3 - CH = Ch2
CH3CH = CHCH3
HC = CH
H2C = CH2
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Question # 25
A fuel has the same knocking property as a mixture of 70 isooctane (2, 2, 4- trimethyl pentane) and 30% n-heptane by volume the octane number of the fuel is
Choose an answer
100
70
50
40
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Question # 26
Amongst the following the compound that can be most readily sulphonated is
Choose an answer
Toluene
Benzene
Nitrobenzene
Chlorobenzene
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Question # 27
The order of dehydration of alcohol
Choose an answer
10> 20> 30
10> 30> 20
20> 30> 10
30> 20> 10
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Question # 28
Which one of the following is (m-xylene)
Choose an answer
1,2 dimethyl benzene
1,3 dimethyl benzene
1,5 dimethyl benzene
1,4 dimethyl benzene
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Question # 29
Raney - nickel is the alloy of Ni with
Choose an answer
Pt
Al
Cu
Pd
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Question # 30
When methane reacts with Cl
2
in the presence of diffused light the products obtained are?
Choose an answer
Chloroform only
Carbon tetrachloride only
Chloromethane and dichloromethane
Mixture of a,b,c
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Question # 31
An alkynes having Carbon count of 20 is
Choose an answer
gas
liquid
Solid
None
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