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Chemistry Test 182
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Chemistry Test 182
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  • Question 1/10
    4 / -1

    Which of the following structures are superimposable (identical) :

    Solutions

    Both in (I) & (III) configuration at lower chiral carbon is 'R' and upper chiral carbon is 'S'.

     

  • Question 2/10
    4 / -1

    If optical rotation is produced by  is + 36o then that is produced by 

    Solutions

    Rotation of the compound in question is zero because it is a meso compound.

     

  • Question 3/10
    4 / -1

    The major product (ester) of the following reaction is

    Solutions

     

  • Question 4/10
    4 / -1

    The most stable conformation of 3-fluorobutan-2-ol is :

    Solutions

     (Stable due to intramolecular H bonding)

     

  • Question 5/10
    4 / -1

    Arrange in decreasing order of e-density in Benzene ring-

    Solutions

    Electron donating ability of group order :

    -NH2 > -N(CH3)2 > - NH - CHO > -NH2

     

  • Question 6/10
    4 / -1

    A Natural Drug was having [a] = 40.3º in polarimeter experiment in clockwise direction what can be the structure of this drug.

    Solutions

     is optically active compound so it rotate the plane of ppl.

     

  • Question 7/10
    4 / -1

    Acetaldehyde and acetylene can not be distinguished by :

    Solutions

    Lucas reagent can not be used to distinguished Acetaldehyde and acetylene.

     

  • Question 8/10
    4 / -1

    Which is the most stable resonating structure.

    Solutions

    Negative charge on more electronegative atom is more stable.

     

  • Question 9/10
    4 / -1

    In which delocalisation of positive charge is possible

    Solutions

    In all other cases positive charge is not in conjugation.

     

  • Question 10/10
    4 / -1

    Which of the following  pairs of structures do not represent resonating structures ?

    Solutions

    Structures given in option(A) are tautomers.

     

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