2. Solved Papers
  3. BVP Medical

BVP Medical BVP Medical Solved Paper-2014

  • question_answer
    In a coagulating experiment, \[C{{H}_{3}}CHO\] of \[AgN{{o}_{3}}\] is mixed with distilled water and 0.2 M solution of an electrolyte AB, so that the total volume is 20 mL. All solutions containing 5.4 mL of AB coagulate within 2 min. The flocculation value sof AB (in millimol) is

    A)  5

    B)  50

    C)  54

    D)  None of the above

    Correct Answer: C

    Solution :

                    Flocculation value is the amount of electrolyte, in millimoles required to bring about complete coagulation of 1 L of colloidal solution. Amount of AB in 5.4 mL of 0.2 M AB                 \[=\frac{5.4\times 0.2}{1000}=1.08\times {{10}^{-3}}mol\] \[20\text{ }mL\] of \[A{{s}_{2}}{{S}_{3}}\] requires AB for coagulation                 \[=1.08\times {{10}^{-3}}mol\] \[1000mL\] of As\[A{{s}_{2}}{{S}_{3}}\]  requires AB (i.e., flocculation value)                                 \[=\frac{1.08\times {{10}^{-3}}}{20}\times 1000\] \[=0.054\text{ }mol=54\]milfimol


You need to login to perform this action.
You will be redirected in 3 sec spinner