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NEET Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank Self Evaluation Test - Surface Chemistry

  • question_answer
    Under the influence of an electric field, the particles in a sol migrate towards cathode. The coagulation of the same sol is studied using \[NaCl,\]\[N{{a}_{2}}S{{O}_{4}}\]  and \[N{{a}_{3}}P{{O}_{4}}\]solutions. Their coagulating values will be in maximum for:

    A) \[NaCl\]                        

    B) \[N{{a}_{2}}S{{O}_{4}}\]

    C) \[N{{a}_{3}}P{{O}_{4}}\]                   

    D) same for all

    Correct Answer: A

    Solution :

    [a] The sol particles migrate towards cathode. So they are positively charged. Hence, anions would be effective in coagulation. Greater is the valence of effective ion, smaller will be its coagulating value.


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