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Chemistry Test 111
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Chemistry Test 111
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  • Question 1/10
    4 / -1

    In hexagonal close packing of sphere in three dimensions.

    Solutions

    hcp = AB  AB AB ...............pattern repeat

    For calculating voids between two layers A and B. 

    The dots are representing tetrahedral voids. 

    no. of tetrahdral voids = 3 + 1 +1/3 × 6 = 6 

    so in one complete unit cell total tetrahedral voids = 12, out of which 8 are completely inside but rest are shared by other unit cells. 

    Octahedral voids = 3 = represented by (x).

    So total octahedral voids = 6 = All are completely inside.     

    [4R = √3 a]

     

  • Question 2/10
    4 / -1

    Bleaching action of H2O2 is due to its :

  • Question 3/10
    4 / -1

    Which of the following is Bacteriostatic  antibiotic. 

  • Question 4/10
    4 / -1

    Which of the following kinds of catalysis can be explained by the adsorption theory?

    Solutions

    Adsorption of gas on solid surface.

     

  • Question 5/10
    4 / -1

    The product obtained in the reaction of diborane with excess of ammonia at low temperature is :

  • Question 6/10
    4 / -1

    Solutions

    The given two compounds are stereoisomers and they are not mirror image of each other hence they are diastereomers.

     

  • Question 7/10
    4 / -1

    A proton accelerated from rest through a potential difference of ‘V’ volts has a wavelength λ associated with it. An alpha particle in order to have the same wavelength must be accelerated from rest through a potential difference of

    Solutions

     

  • Question 8/10
    4 / -1

    Calamine is:-

  • Question 9/10
    4 / -1

    Which of the following have maximum dipole moment.  

    Solutions

     

  • Question 10/10
    4 / -1

    On reacting with KMnO4, FeSO4 converts into Fe+3 in acidic medium. If 250 ml of  FeSO4  reacts with 32 ml of 5 M solution of KMnO4. The molarity of  FeSO4  solution is :

    Solutions

    32 × 5 × 5 = 250 × M × 1   M = 3.2

     

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