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Hydrocarbons Test - 4

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Hydrocarbons Test - 4
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following molecules is aromatic and stable at room temperature in its pure form?
  • Question 2
    1 / -0
    Benzene reacts with acetyl chloride in the presence of AlCl3 to give
  • Question 3
    1 / -0

    Stereoisomeric alkenes due to different arrangement of atoms or groups in space are referred to as

    Solution

    Isomers which have the same structural formulae but difffer in the relative spatial arrangements of atoms or groups around the double bond are called geometric isomers.athus geometrical isomers are atype of stereoisomers.

  • Question 4
    1 / -0

    in cycloalkanes carbon atoms form

    Solution

    Cycloalkanes contain single bond between the carbon atoms,they form ring structures and have the general formula CnH2n

  • Question 5
    1 / -0
    The numbers of 3o, 2o and 1o hydrogens in isopentane respectively are 
  • Question 6
    1 / -0
    The numbers of sigma and pi bonds present in 1, 3, 5, 7-octatetraene respectively are
  • Question 7
    1 / -0

    The number of possible conformational isomers of ethane is

    Solution

    conformational isomers are obtained by rotation about a carbon-carbon single bond.This results in infinite number of momentary arrangements of atoms in space.Hence for ethane infinite number of conformations are possible.

  • Question 8
    1 / -0
    The ozonolysis of (CH3)2C=C(CH3)2, followed by treatment with zinc and water, will give
  • Question 9
    1 / -0
    Which of the following species is not aromatic in nature?
  • Question 10
    1 / -0
    Electrolysis and decarboxylation of  respectively give
  • Question 11
    1 / -0
    What is the IUPAC name of the following compound?

  • Question 12
    1 / -0

    In the alkene having IUPAC name 3-Methyl-1-butene the double bond lies on carbon atom numbered

    Solution

    ‘1’ is written before butene which indicates that the position of the double bond is on carbon 1.The structure of the compound is: CH2=CHCH(CH3)CH3

  • Question 13
    1 / -0
    Which of the following compounds has the lowest dipole moment?
  • Question 14
    1 / -0
    In Friedel-Crafts synthesis of toluene, the reactants in addition of anhydrous AlCl3 are
  • Question 15
    1 / -0
    The IUPAC name of the compound having the formula CH≡C-CH=CH2, is
  • Question 16
    1 / -0

    Halogenation of alkanes is a

    Solution

    Halogenation of alkanes is a substitution reaction because the hydrogen atoms are replaced by halogens in the presence of sunlight  to give the corresponding alkyl halides.The reaction follows free radical mechanism.

  • Question 17
    1 / -0
    Choose the correct name for the given reaction.
  • Question 18
    1 / -0

    boiling point of alkanes

    Solution

    As molecular mass increases,the magnitude of van der Waals forces of attraction increases and hence boiling point increases accordingly.

  • Question 19
    1 / -0
    In the reaction , Y is
  • Question 20
    1 / -0
    A gas, on passing through ammoniacal AgNO3 solution, does not give any precipitate, but decolourises alkaline KMnO4 solution. The gas may be
  • Question 21
    1 / -0
    Which among the following is the most stable conformation of n-butane?
  • Question 22
    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
  • Question 23
    1 / -0
    The compound which forms only acetaldehyde upon ozonolysis is
  • Question 24
    1 / -0
    Which of the following will not react with the ammoniacal solution of silver nitrate?
  • Question 25
    1 / -0
    The radical  is aromatic because it has
  • Question 26
    1 / -0

    Saturated Hydrocarbons contain

    Solution

     saturated hydrocarbons  are the compounds in which there is a single bond between the carbon atoms.They are also called alkanes and have the general formula CnH2n+2

  • Question 27
    1 / -0

    One of the methods of preparing ethylene is given below.This is an example of _______ reaction

    Solution

    Dehydration of alcohols in the presence of alc. KOH to form an alkene is an example of elimination reaction.

  • Question 28
    1 / -0
    Which of the following alkanes has the maximum melting point?
  • Question 29
    1 / -0
    Ozonolysis of benzene gives
  • Question 30
    1 / -0
    The isomers which are interconverted through rotation around a single bond are
  • Question 31
    1 / -0
    Which of the following will not show geometrical isomerism?
  • Question 32
    1 / -0

    Which of these fuels given below is not a hydrocarbon?

    Solution

    Because hydrocarbons contain both C and H and hence Hydrogen is not a hydrocarbon.

  • Question 33
    1 / -0
    Arrange the halogens F2, Cl2, Br2 and I2 in order of their increasing reactivity with alkanes.
  • Question 34
    1 / -0
    Arrange the following carboanions in order of their decreasing stability:

    A. H3C-C≡C-
    B. H-C≡C-
    C. H3C-CH2-
  • Question 35
    1 / -0

    Which of these is not a characteristic of aromatic Hydrocarbons?

    Solution

    aromatic hydrocarbon are not open chained. They are ring structures.they contain one or more benzene rings either fused or isolated in their molecules.

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