Hydrocarbons CBSE Questions & Answers

Hydrocarbons

This is Chemistry Class 11 Hydrocarbons CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Phenyl magnesium bromide reacts with methanol to give
  • A
    a mixture of benzene and Mg(OMe)Br
    Correct
  • B
    a mixture of anisole and Mg(OH)Br
  • C
    a mixture of toluene and Mg(OH)Br
  • D
    a mixture of phenol and Mg(Me)Br
2
A gas decolourised by KMnO4 solution but gives no precipitate with ammoniacal cuprous chloride is
  • A
    Methane
  • B
    Acetylene
  • C
    Ethane
  • D
    Ethene
    Correct
3
What would be the product formed when 1-Bromo-3-chlorocyclobutane reacts with two equivalents of metallic sodium in ether?
Question 3 figure 1
  • A
    (A)
  • B
    (D)
    Correct
  • C
    (C)
  • D
    (B)
4
2 methylbutane on reacting with bromine in the presence of sunlight gives mainly
  • A
    2-bromo 3-methylbutane
  • B
    2-bromo 2-methylbutane
    Correct
  • C
    1-bromo 2-methylbutane
  • D
    1-bromo 3-methylbutane
5
Alkyl halides react with dialkyl copper reagents to give
  • A
    alkyl copper halides
  • B
    alkanes
    Correct
  • C
    alkenes
  • D
    alkenyl halides
6
n-Propylbromide on treatment with ethanolic KOH is
  • A
    Propene
    Correct
  • B
    Propane
  • C
    Propanal
  • D
    Propyne
7
Acetylene is prepared by the action of water on
  • A
    \({\text{A}}{{\text{l}}_{\text{4}}}{{\text{C}}_{\text{3}}}\)
  • B
    \({\text{Ca}}{{\text{C}}_{\text{2}}}\)
    Correct
  • C
    All of these
  • D
    Silicon carbide
8
Water product is obtained on electrolyzing potassium fumarate
  • A
    \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{2}}}\)
    Correct
  • B
    \({\text{C}}{{\text{H}}_{\text{4}}}\)
  • C
    \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{6}}}\)
  • D
    \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{4}}}\)
9
What product is obtained by heating ethylidene chloride with alcoholic KOH?
  • A
    Ethene
  • B
    Ethane
  • C
    Methane
  • D
    Ethyne
    Correct
10
What product is obtained by passing ethanol vapours over heated alumina?
  • A
    \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{4}}}\)
    Correct
  • B
    \({\text{C}}{{\text{H}}_{\text{4}}}\)
  • C
    \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{2}}}\)
  • D
    \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{6}}}\)
11
Ethane is obtained by electrolyzing
  • A
    Pot. Succinate
    Correct
  • B
    All of these
  • C
    Pot. Fumarate
  • D
    Pot. Acetate
12
Pyrolysis of coal with heavy oil in presence of H2 at 250 atm. \({\text{35}}0{\text{oC}}\) and catalyst yields.
  • A
    \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{6}}}\)
  • B
    A mixture of low boiling hydrocarbons
    Correct
  • C
    \({{\text{C}}_{\text{3}}}{{\text{H}}_{\text{8}}}\)
  • D
    \({\text{C}}{{\text{H}}_{\text{4}}}\)
13
Marsh gas mainly contains.
  • A
    \({\text{C}}{{\text{H}}_{\text{4}}}\)
    Correct
  • B
    \({{\text{H}}_{\text{2}}}{\text{S}}\)
  • C
    CO
  • D
    \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{2}}}\)
14
Organic compounds are found in.
  • A
    only Vegetable kingdom
  • B
    only Animal kingdom
  • C
    Both animal and vegetable kingdom
    Correct
  • D
    only Mineral kingdom
15
Organic compound can be formed by
  • A
    Plants and animals and synthesis in laboratory
    Correct
  • B
    Animals only
  • C
    Plants and animals only
  • D
    Plants only