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ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons Online Test MCQs With Answers
Question # 1
Alkanes are soluble in all except
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Benzene
Ether
Water
Carbon tetra chloride
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Question # 2
Alkyl halides when reduced with nascent hydrogen in the presence of Zn + HCI, are converted to
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Alkynes
Alkenes
Alkanes
Alcohol
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Question # 3
An alkynes having Carbon count of 20 is
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gas
liquid
Solid
None
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Question # 4
Hybridization in alkanes is:
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sp
sp
2
sp
3
dsp
2
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Question # 5
Benzene is obtained from benzene sulphonic acid by treating with
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HCl
NaOH
H
2
O
NaHCO
3
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Question # 6
Which gas is produced by treating CaC
2
with water
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Methane
Ethane
Acetylene
HCI
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Question # 7
Which reaction is too vigorous to control
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Chlorination
Bromination
Iodination
Fluorination
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Question # 8
The presence of a double bond in a compound in the sign of:
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Saturation
Unsaturation
Subsitution
None
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Question # 9
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 # 10
If we remove one hydrogen atom from an alkane we obtain a group called
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Acetyle group
Formyle group
Alkyle group
Ketyle group
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Question # 11
How many molecules of chlorine adds in benzene in the presence of sunlight
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One
Two
Three
Four
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Question # 12
A six membered ring containing one double bond called
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Cyclohexene
Cyclohexane
Cyclohexadiene
None
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Question # 13
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 # 14
CnH
2n
is the general formula of
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Alkanes
Alkanes
alkynes
None of above
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Question # 15
To differentiate isomers we use
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n-
iso-
neo
All of them
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Question # 16
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 # 17
Toluene is also called
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Hydroxyl benzene
Methyl benzene
ethyl benzene
None
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Question # 18
Cyclohexane can be converted not benzene in the presence of
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Pt at 100°C
Pt at 250°C
Pd at room temperature
Pt at room temperature
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Question # 19
Benzene has a -------- structure
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Pentagonal
Hexagonal
Heptagonal
Tetragonal
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Question # 20
Hydrocarbon which is liquid at room temperature is
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Pentane
Butane
Propane
Ethane
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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
Vinyl acetylene combines with HCI to form
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Poly acetylene
Benzene
Chloroprene
Divinylacetylene
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Question # 23
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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