Hydrocarbons MCQs | Question – Paper 2 6

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Topic: Hydrocarbons, Test No.: 02, Total MCQs: 15

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Question 1
The hydrocarbon which can react with sodium in liquid ammonia is [AIEEE 2008]
A

CH3CH2CH2C≡CCH2CH2CH3

B

CH3CH2C≡CH

C

CH3CH=CHCH3

D

CH3CH2C≡CCH2CH3

Question 2

The treatment of CH3MgX with CH3C ≡ C−H produces [AIEEE 2008]

A

CH3−CH = CH2

B

CH3C ≡ C−CH3

C

D

CH4

Question 3

Benzene reacts with chlorine in sunlight to give a final product [Karnataka CET 2007]

A

C6H5Cl

B

C6Cl6

C

C6H6Cl6

D

CCl4

Question 4

The general formula of a cycloalkane is [Karnataka CET 2007]

A

CnH2n+2

B

CnH2n–2

C

CnH2n

D

CnHn

Question 5

Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E. Compound E on further treatment with aqueous KOH yields compound F. Compound F is [IIT JEE 2007]

A
Option (A)
B
Option (B)
C
Option (C)
D
Option (D)
Question 6

The reagent(s) for the following conversion,

is/are [IIT JEE 2007]

A

alcoholic KOH

B

alcoholic KOH followed by NaNH2

C

aqueous KOH followed by NaNH2

D

Zn/CH3OH

Question 7
Presence of a nitro group in a benzene ring [AIEEE 2007]
A
activates the ring towards electrophilic substitution
B
renders the ring basic
C
deactivates the ring towards nucleophilic substitution
D
deactivates the ring towards electrophilic substitution
Question 8

The compound formed as a result of oxidation of ethyl benzene by KMnO4 is [AIEEE 2007]

A
benzophenone
B
acetophenone
C
benzoic acid
D
benzyl alcohol
Question 9

Which of the following reactions will yield 2, 2-dibromopropane? [AIEEE 2007]

A

CH3 − C ≡ CH + 2HBr →

B

CH3 CH ≡ CHBr + HBr→

C

CH ≡ CH + 2HBr→

D

CH3 − CH = CH2 + HBr →

Question 10

HBr reacts with CH2 = CH – OCH3 under anhydrous conditions at room temperature to give [AIEEE 2006]

A

CH3CHO and CH3Br

B

BrCH2CHO and CH3OH

C

BrCH2 – CH2 – OCH3

D

H3C – CHBr – OCH3

Question 11
Phenyl magnesium bromide reacts with methanol to give [AIEEE 2006]
A
a mixture of anisole and Mg(OH)Br
B
a mixture of benzene and Mg(OMe)Br
C
a mixture of toluene and Mg(OH)Br
D
a mixture of phenol and Mg(Me)Br
Question 12

A gas decolourised by KMnO4 solution but gives no precipitate with ammoniacal cuprous chloride is [Karnataka CET 2005]

A
Ethane
B
Methane
C
Ethene
D
Acetylene
Question 13

What would be the product formed when 1-Bromo-3-chlorocyclobutane reacts with two equivalents of metallic sodium in ether? [IIT JEE 2005]

A
Option (A)
B
Option (B)
C
Option (C)
D
Option (D)
Question 14
2 methylbutane on reacting with bromine in the presence of sunlight gives mainly [AIEEE 2005]
A
1-bromo 2-methylbutane
B
2-bromo 2-methylbutane
C
2-bromo 3-methylbutane
D
1-bromo 3-methylbutane
Question 15
Alkyl halides react with dialkyl copper reagents to give [AIEEE 2005]
A
alkanes
B
alkyl copper halides
C
alkenes
D
alkenyl halides
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6 thoughts on “Hydrocarbons MCQs | Question – Paper 2”

  • Reply ↓
    A

    Can I plz explain ques 3 … benzene form only one monosubstituted product in substitution end and it form hexachorobenzene with excess of chlorine in anhydrous medium

    • Reply ↓
      sara

      when benzene react with 3 mole of cl2 with sunlight it gives BHC.it is a powerful pesticide.

    • Reply ↓
      Rithick Prabakar

      Usually Benzene doesn’t react with anything in general but since we provide sunlight(which is like drastic condition) the bonds cleave(the pi bonds not sigma), so this results in like a normal cyclo alkane. Then the chlorine reacts(since its excess) with cyclo hexane and forms gammaxene.

    • Reply ↓
      danish

      when chlorine react with benzene in the presence of sunlight then it break its all double bonds and in place form bonds with chlorine to form the C6H6Cl6