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Online Tests
ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons Online Test MCQs With Answers
Question # 1
Catalytic oxidation of alkanes is used for the preparation of
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Adehydes
Ketones
Fatty acid
Carbonyylic acids
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Question # 2
Free radical mechanism of halogenation of alkanes follow step:
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Initiation
Propagation
Termination
All of these
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Question # 3
Th IUPAC name of the compound having formula (CH3) 3 C - CH = CH2 is
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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 # 4
What is not a common use of methane
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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 # 5
Octane number is zero for
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n-Heptane
Isooctane
n-Hexane
Isoheptane
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Question # 6
Hydrocarbons are organic compounds which contain elements such as
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Hydrogen
Carbon
Hydrogen and carbon
Halogens
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Question # 7
The treatment of benzene with isobutene in the presence of sulphuric acid give
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isobutyl benzene
tert-Butyl benzene
n- Butyl benzene
no reaction
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Question # 8
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 # 9
Alkyne is :
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CH
3-
CH
3
CH
4
CH
2=
CH
2
C
2
H
2
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Question # 10
The electrophile in aromatic sulphonation is
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H
2
SO
4
HSO
4
SO
3
SO
3
+
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Question # 11
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 # 12
Which of the following is an ortho-para directing group
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Question # 13
Preparation of vegetable ghee involves
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Halogenations
Hydrogenation
Hydroxylation
Dehydrogenation
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Question # 14
Benzene has a -------- structure
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Pentagonal
Hexagonal
Heptagonal
Tetragonal
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Question # 15
Which of the following decolorized Br
2
-water
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Methane
Ethane
Ethene
Propane
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Question # 16
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
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100
70
50
40
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Question # 17
Hybridization in alkanes is:
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sp
sp
2
sp
3
dsp
2
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Question # 18
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 # 19
Which of the following possesses the highest melting point?
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Chlorobenzene
0-Dichlorobenzene
m-Dichlorobenzene
p-Dichlorobenzene
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Question # 20
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 # 21
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2-bromonitrobenzene
2-nitrobromobenzene
1-bromonitrobenzene
1-nitrobromobenzene
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Question # 22
Mustard gas is a
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Gas
High boiling speed
High melting liquid
Steam
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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
The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with
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Hund's rule
Markownikov's rule
Pauli's Exclusion principle
Auf ban principle
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Question # 25
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 # 26
Octane number can be changed by
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Isomerisation
Alkylation
Cyclisation
All of these
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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
Which one gives acidic reactions?
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CH
3
----C
≡C-------CH
3
CH
3
-----CH
2
-----HC=CH----CH
2
CH
3
----CH=CH
2
CH
3
-----C
≡CH
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Question # 29
The electron releasing effect of methyl group is significant and it makes ring a good
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Electrophilic
Nucleophilic
Nucleophobic
Hydrophobic
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Question # 30
The presence of a double bond in a compound is the sign of
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Saturation
Unsaturation
Substitution
None of above
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Question # 31
Hydrocarbon which is liquid at room temperature is
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Pentane
Butane
Propane
Ethane
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