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Chemistry Test 21
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Chemistry Test 21

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  • Question 1/10
    4 / -1

    As the temperature is raised from 20 °C to 40 °C, the average kinetic energy of neon atoms changes by a factor of which of the following?

    Solutions

  • Question 2/10
    4 / -1

    The synthesis of alkyl fluorides is best accomplished by:

    Solutions

    R – X + AgF → R – F + AgX (Swarts reaction)

  • Question 3/10
    4 / -1

    Solubility product of silver bromide is  The quantity of potassium bromide (molar mass taken as 120 g mol–1) to be added to 1 litre of 0.05 M solution of silver nitrate to start the precipitation of AgBr is

    Solutions

     

  • Question 4/10
    4 / -1

    The solubility product of a salt having general formula MX2, in water is : 4 × 10-12. The concentration of M2+ ions in the aqueous solution of the salt is

    Solutions

  • Question 5/10
    4 / -1

    The cell, Zn |Zn2+ (1M) || Cu2+ (1M) | Cu  was allowed to be completely discharged at 298 K. The relative concentration of Zn2+ to Cu2+ 

    Solutions

     

  • Question 6/10
    4 / -1

    In the following sequence of reactions, 
     the compound ‘D’ is:

    Solutions

     

  • Question 7/10
    4 / -1

    Reaction of aqueous sodium hydroxide on

    (i) ethyl bromide (normal temperature)

    (ii) chlorobenzene (at high temperature and pressure) gives

    Solutions

    The phenoxide forms phenol only after hydrolysis in presence of an acid.

  • Question 8/10
    4 / -1

    The hydrocarbon which can react with sodium in liquid ammonia is

    Solutions

    The hydrogen which has the acidic hydrogen can react with sodium in liquid ammonia. Among the given options, only CH3–CH2–C≡CH has the acidic hydrogen, thus it can react with sodium in liquid ammonia.

  • Question 9/10
    4 / -1

    A given solution of H2O2 is 30 volumes. Its concentration in terms of molarity is:

    Solutions

    Percentage strength of 10 vol.H2O2 = 3g. 
    Thus, 100 ml of 30 vol. H2O2 contain 3 × 3 = 9 g

     

  • Question 10/10
    4 / -1

    The colour of KMnO4 is due to:

    Solutions

    Colour of KMnO4 is due to charge transfer from O2- (ligand) to Mn(VII) (Central metal ion). 

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