Hydrocarbons MCQs | Question – Paper 3

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Topic: Hydrocarbons, Test No.: 03, Total MCQs: 10

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Question 1
Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?
A
–C ≡ N
B
–SO3H
C
–COOH
D
–NO2
Question 2
When 2-butyne is treated with Pd-BaSO4; the product formed will be:
A
1-butene
B
trans-2-butene
C
cis-2-butene
D
2-hydroxy butane
Question 3
Which of the following compounds will not undergo Friedel-Craft's reaction easily?
A
Cumene
B
Xylene
C
Nitrobenzene
D
Toluene
Question 4
Which of the following has highest knocking?
A
Straight chain olefins
B
Branched chain olefins
C
Olefins
D
Aromatic hydrocarbons
Question 5
Which of the following reagents when heated with ethyl chloride, forms ethylene?
A
Alcoholic KOH
B
Zn/HCl
C
Aqueous KOH
D
HI
Question 6
The radical image001 is aromatic because it has
A
6 p-orbitals and 6 unpaired electrons
B
7 p-orbitals and 6 unpaired electrons
C
7 p-orbitals and 7 unpaired electrons
D
6 p-orbitals and 7 unpaired electrons
Question 7
The coal tar fraction which contains phenol is: [Karnataka CET 2004]
A
Heavy oil
B
Light oil
C
Middle oil
D
Green oil
Question 8
The first fraction obtained during the fractionation of petroleum is: [Karnataka CET 2004]
A
Gasoline
B
Diesel oil
C
Hydrocarbon gases
D
Kerosene oil
Question 9
Which one of the following methods is neither meant for the synthesis nor for separation of amines? [AIEEE 2005]
A
Wurtz reaction
B
Hofmann method
C
Hinsberg method
D
Curtius reaction
Question 10
Reaction of one molecule of HBr with one molecule of 1, 3-butadiene at 40°C gives predominantly [AIEEE 2005]
A
3-bromobutene under kinetically controlled conditions
B
1-bromo-2-butene under thermodynamically controlled conditions
C
3-bromobutene under thermodynamically controlled conditions
D
1-bromo-2-butene under kinetically controlled conditions
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