Please wait...

Hydrocarbons Test - 4
Result
Hydrocarbons Test - 4

  • /

    Score

  • -

    Rank
Time Taken: -
  • Question 1/10
    1 / -0

    A gas on passing through ammoniacal AgNO3 solution does not give any precipitate but decolourises alkaline KMnO4 solution. The gas may be

    Solutions

    The gas on passing through ammoniacal AgNO3 solution does not give any precipitate, so it cannot be a terminal alkyne. Hence, C2H2 cannot be our choice. Alkanes do not react with KMnO4.
    Since it decolourises alkaline KMnO4 solution, the gas is an alkene and can be C2H4.
    Under alkaline conditions, the manganate(VII) ions are first reduced to green manganate(VI) ions.

     

  • Question 2/10
    1 / -0

    In Friedel-Crafts synthesis of toluene, the reactants in addition of anhydrous AlCl3 are

    Solutions

     

  • Question 3/10
    1 / -0

    Which of the following alkenes has/have almost zero dipole moment?

    A. trans-dichloroethene
    B. cis-but-2-ene
    C. cis-dichloroethene
    D. trans-but-2-ene

    Solutions

     

  • Question 4/10
    1 / -0

    The ozonolysis of (CH3)2C=C(CH3)2, followed by treatment with zinc and water, will give

    Solutions

     

  • Question 5/10
    1 / -0

    The compound which forms only acetaldehyde upon ozonolysis is

    Solutions

     

  • Question 6/10
    1 / -0

    The IUPAC name of the compound having the formula CH≡C-CH=CH2, is

    Solutions

    The IUPAC name of the compound having the formula CH≡C-CH=CH2, is 1-buten-3-yne.

     

  • Question 7/10
    1 / -0

    Which of the following compounds has the lowest dipole moment?

    Solutions

    As it has symmetrical structure, so it has the lowest dipole moment.

     

  • Question 8/10
    1 / -0

    Arrange the following carboanions in order of their decreasing stability:

    A. H3C-C≡C-
    B. H-C≡C-
    C. H3C-CH2-

    Solutions

    Decreasing order of stability of given carboanions is B > A > C.

     

  • Question 9/10
    1 / -0

    Which of the following will not react with the ammoniacal solution of silver nitrate?

    Solutions

    Only terminal alkynes react with the ammoniacal solution of silver nitrate.

     

  • Question 10/10
    1 / -0

    Which of the following molecules is aromatic and stable at room temperature in its pure form?

    Solutions

    (2) and (3) are anti-aromatic and unstable. (1) is non-aromatic. (4) is aromatic and stable at room temperature.

     

User Profile
-

Correct (-)

Wrong (-)

Skipped (-)

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Click on Allow to receive notifications
×
Open Now