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Manipal Medical Manipal Medical Solved Paper-2002

  • question_answer
    A colloidal solution is subjected to an electric field. The colloidal particles more towards anode. The coagulation of die same solution studied using\[NaCl,BaCl\]and\[AlC{{l}_{3}}\] solutions. The coagulation power is in the order of:

    A)  \[BaCl>NaCl>AlC{{l}_{3}}\]

    B)  \[NaCl>BaCl>AlC{{l}_{3}}\]

    C)  \[AlC{{l}_{3}}>BaCl>NaCl\]

    D)  \[NaCl>AlC{{l}_{3}}>BaC{{l}_{2}}\]

    Correct Answer: C

    Solution :

     The correct order for coagulation power is\[AlC{{l}_{3}}>BaC{{l}_{2}}>NaCl\]. The reason for this is that greater the valency of an ion greater is its coagulating power.


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