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Practical Organic Chemistry Test - 3

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Practical Organic Chemistry Test - 3
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Identify the main source(s) of organic compounds.

    Solution

    Coal, petroleum, and natural gas are fossil fuels. Coal is chiefly carbon along with some impurities and coke is obtained by the destructive distillation of coal. Petroleum is a mixture of hydrocarbons, which are carbon compounds. Natural gas, which is obtained along with petroleum, is also a mixture of hydrocarbons. The compounds of carbon are referred to as organic compounds.

     

  • Question 2
    1 / -0

    The correct order of bond energies of the following bonds is:

    (I) C(sp3)-C(sp3), (II) C(sp2)-C(sp2), (III) C(sp)-C(sp)

    Solution

    The sp hybridised orbital has 50% 's' character.
    The sp2 hybridised orbital has 33% 's' character.
    The sp3 hybridised orbital has 25% 's' character.
    Bond energy increases as the 's' character increases.

     

  • Question 3
    1 / -0

    The compounds C2H5OC2H5 and CH3OCH2CH2CH3 are

    Solution

    Metamerism: In this type of isomerism, structural formulae of the isomers differ due to the difference in the distribution of carbon atoms around a polyvalent atom or functional groups. For example:

    (i) C2H5 - O - C2H5 and
    Diethyl ether
    CH3 - O - CH2 - CH2 - CH3
    Methyl n-propyl ether

    (ii) C2H5 - NH - C2H5 and
    Diethyl amine
    CH3 - NH - CH2 - CH2 - CH3
    Methyl n-propyl amine

     

  • Question 4
    1 / -0

    The minimum number of carbon atoms necessary for a hydrocarbon to form a branched structure is

    Solution

    The minimum number of carbon atoms necessary for a hydrocarbon to form a branched structure is four.

     

  • Question 5
    1 / -0

    Which of the following species does not have an sp2 hybridised carbon atom?

    Solution

    Here, C atom is sp3 hybridised.

     

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