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

  • question_answer
    Given below are a few electrolytes, indicate which one among them will bring about the coagulation of a gold sol quickest and in the least of concentration? 

    A) \[NaCl\]                        

    B) \[MgS{{O}_{4}}\]

    C) \[A{{l}_{2}}{{\left( S{{O}_{4}} \right)}_{3}}\]             

    D) \[{{K}_{4}}[Fe{{(CN)}_{6}}]\]

    Correct Answer: C

    Solution :

    [c] Gold sol. have negative charge. So \[A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\]is most effective for coagulation.


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