Hydrocarbons MCQs | Question – Paper 1

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Topic: Hydrocarbons, Test No.: 01, Total MCQs: 15

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Question 1
Among the following compounds the one that is most reactive towards electrophilic nitration is [CBSE AIPMT 2012]
A
Toluene
B
Benzene
C
Benzoic Acid
D
Nitrobenzene
Question 2
Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide? [AIEEE 2012]
A
Tertiary butyl chloride
B
Neopentane
C
Isohexane
D
Neohexane
Question 3
Ethyl benzene CANNOT be prepared by ______. [Karnataka CET 2011]
A
Clemmensen reduction
B
Wurtz reaction
C
Wurtz-Fittig reaction
D
Friedel-Crafts reaction
Question 4

Identify B and D is the following sequence of reactions. [Karnataka CET 2011]

A
Ethanol and alcoholic KOH
B
Methanol and bromoethane
C
Ethyl hydrogen sulphate and alcoholic KOH
D
Ethyl hydrogen sulphate and aqueous KOH
Question 5
Ozonolysis of an organic compound 'A' produces acetone and propionaldehyde in equimolar mixture. Identify 'A' from the following compounds [AIEEE 2011]
A
1 - Pentene
B
2 - Methyl - 1 - pentene
C
2 - Methyl - 2 - pentene
D
2 - Pentene
Question 6
Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of [AIEEE 2011]
A
A vinyl group
B
Two ethylenic double bonds
C
An acetylenic triple bond
D
An isopropyl group
Question 7

The non-aromatic compound among the following is [AIEEE 2011]

A
Option (A)
B
Option (B)
C
Option (C)
D
Option (D)
Question 8
A dibromo derivative of an alkane reacts with sodium metal to form an alicyclic hydrocarbon. The derivative is ______. [Karnataka CET 2010]
A
2, 2-dibromobutane
B
1, 1-dibromopropane
C
1, 4-dibromobutane
D
1, 2-dibromoethane
Question 9
Which one of these is NOT TRUE for benzene? [Karnataka CET 2010]
A
Heat of hydrogenation of benzene is less than the theoretical value
B
There are three carbon-carbon single bonds and three carbon-carbon double bonds
C
It forms only one type of monosubstituted product
D
The bond angle between carbon-carbon bonds is 120°
Question 10

The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are [IIT JEE 2010]

A

BrCH2CH2CH2CH2CH3 and CH3CH2C ≡ CH

B

BrCH2CH2CH3 and CH3CH2CH2C ≡ CH

C

BrCH2CH2CH2CH2CH3 and CH3C ≡ CH

D

BrCH2CH2CH2CH3 and CH3CH2C ≡ CH

Question 11
One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is [AIEEE 2010]
A
Ethane
B
Propene
C
1-butene
D
2-butene
Question 12
n-propyl bromide on treating with alcoholic KOH produces [Karnataka CET 2008]
A
propyne
B
propene
C
propane
D
propanol
Question 13

The angle strain in cyclobutane is [Karnataka CET 2008]

A

24°44′

B

29°16′

C

19°22′

D

9°44′

Question 14

The overlapping of orbitals in benzene is of the type [Karnataka CET 2008]

A
sp – sp
B
p – p
C

sp2 – sp2

D

sp3 – sp3

Question 15

In the following sequence of reactions, the alkene affords the compound 'B'

CH3 CH = CHCH3

The compound B is [AIEEE 2008]

A

CH3CH2CHO

B

CH3COCH3

C

CH3CH2COCH3

D

CH3CHO

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