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Organic Chemistry - Some Basic Principles and Techniques Test - 1

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Organic Chemistry - Some Basic Principles and Techniques Test - 1
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Weekly Quiz Competition
  • Question 1
    1 / -0

    The following question has four choices out of which ONLY ONE is correct.
    An organic compound having molecular mass 60 g is found to contain C = 20%, H = 6.67% and N = 46.67% while the rest is oxygen. On heating, it gives NH3 along with a solid residue. The solid residue gives violet colour with alkaline copper sulphate solution. The compound is

  • Question 2
    1 / -0

    In π (pi) bond formation, one of the below criteria is necessary. Choose the appropriate one.

    Solution

    Parallel orientation of p orbitals on adjacent atoms is necessary for side-ways overlapping and formation of π bond.

  • Question 3
    1 / -0

    The following question has four choices out of which ONLY ONE is correct.
    An isopropyl group has molecular formula C3H7 –. In their structure, two methyl groups are attached to a carbon containing one hydrogen atom and this group is attached to carbon chain.
    Which of the following organic compounds belongs to this category?

  • Question 4
    1 / -0

    Change in hybridisation affects the carbon’s and the organic compound’s

    Solution

    in hybridization as % of 's'character increases electronegativity also increases.
    more the s charater, more will be the electronegativity of that atom.
    increasing order ofelectronegativity  with %s character is sp (50%) >  sp2(33.33%) >  sp3(25%)

  • Question 5
    1 / -0

    Delocalisation of σ-electrons of C -H bond of an alkyl group directly attached to an atom of unsaturated system or to an atom with an unshared p-orbital is called :

    Solution

    The interaction of the electrons in a sigma bond (usually C–H or C–C) with an adjacent empty (or partially filled) non-bonding p-orbital, antibonding σ or π orbital,or filled π orbital, to give an extended molecular orbital that increases the stability of the system is Hyperconjugation.

  • Question 6
    1 / -0

    Which of the following statements about resonance is not true?

  • Question 7
    1 / -0

    Hybridisation in methane (CH4), ethene (C2H4), ethyne (C2H2) involves s and p orbitals. Choose the correct hybrid orbitals in the options given below for CH4, C2H4 and, C2H2 respectively

    Solution

    In methane C is sp3 hybridised because of 3 sigma bond formation. While in ethane both the C are sp2 hybridised, and in ethyne both the C are sp hybridised.

  • Question 8
    1 / -0

    Which of the following is not an aromatic compound?

  • Question 9
    1 / -0

    Identify the main source(s) of organic compounds.

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