CMC Medical CMC-Medical Ludhiana Solved Paper-2009

  • question_answer
    Which of the following electrolytes will have maximum flocculation value for \[Fe{{(OH)}_{3}}\]sol?

    A)  \[NaCl\]                             

    B)  \[N{{a}_{2}}S\]

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

    D)  \[{{K}_{2}}S{{O}_{4}}\]

    Correct Answer: A

    Solution :

                    Flocculation value \[\propto \frac{\text{1}}{\text{coagulating}\,\,\text{power}}\]\[Fe{{(OH)}_{3}}\]is a positively charged To coagulate\[Fe{{(OH)}_{3}},\]\[-ve\]charged electrolyte is used and greater the value of\[-ve\] charge coagulating power will be strong. Among the given electrolytes, \[NaCl\]has lowest coagulating power, so its flocculation value will be maximum.


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