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Chemistry Test 97

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Chemistry Test 97
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  • Question 1
    4 / -1

    Arrange the following aqueous solutions in order of increasing freezing points (that is lowest first) :-

    I.  0.10 m Ba3(PO4)2    II.  0.10 m Na2SO4    III.  0.10 m C2H5OH     IV.  0.10 m KCl      V.  0.10 m Li3PO4

    Solution

    Ba3(PO4)2 has 5 moles of ions per mol of formula units ; Li3PO4 has 4 ; Na2SO4 has 3 and KCl has 2.C2H5OH is non ionic. It has 1 mole of molecules per mol of formula units.

     

  • Question 2
    4 / -1

    Calamine on heating produce a gas, same gas can be produce by–

  • Question 3
    4 / -1

    Select the incorrect statement :

  • Question 4
    4 / -1

    Which of the following are correct :-

  • Question 5
    4 / -1

    Select the correct statement(s)

  • Question 6
    4 / -1

    For the titration of a solution of HCl against NaOH solution, hydrogen electrode is dipped into HCl solution. Then this electrode is connected to normal calomel electrode (NCE).

    In such experiment 25 ml of HCl (0.1M) is titrated against a standard 0.1 M NaOH solution ENCE.(reduction)  = 0.24V ; 2.303RT / F = 0.06

    Ecell after adding 24.95 ml of NaOH

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