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Surface Chemist...

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  • Question 1
    1 / -0

    Which of the following statements is wrong?

  • Question 2
    1 / -0

    Which of the following reactions yields a colloidal substance?

  • Question 3
    1 / -0

    In the table, 1 litre each of the two solutions X and Y is given and to coagulate each one of them, the numbers of millimoles of NaCl and MgCl2 are also shown.

    In litre → X Y
    NaCI (mmol) 51 46
    MgCI2 (mmol) 71 23

    From the options, choose the value which is not reasonable for the amount of other salt required to cause precipitation.

  • Question 4
    1 / -0

    On the addition of 10 ml of 10% NaCl solution to 10 ml of gold sol in presence of 0.07 g of dextrin, the coagulation is just prevented. The gold number of dextrin is

  • Question 5
    1 / -0

    Choose the incorrect statement about emulsion.

  • Question 6
    1 / -0

    The method usually employed for the destruction of a colloidal solution is

  • Question 7
    1 / -0

    Bredig's Arc Method involves dispersion as well as aggregation of Colloidal solutions. During their preparation, traces amount of caustic alkali is added for which of the following reasons?

  • Question 8
    1 / -0

    Which of the following will have the minimum flocculation value for the As2S3 sol?

  • Question 9
    1 / -0

    Bredig's arc method is a method for the preparation of colloidal solutions. This method is used for the preparation of the colloidal solution of which of the following metals?

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