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J & K CET Engineering J and K - CET Engineering Solved Paper-2010

  • question_answer
    The charge on \[\text{Fe(OH}{{\text{)}}_{\text{3}}}\]sol is due to

    A)  adsorption of hydroxyl ion

    B)  adsorption of hydrogen ion

    C)  adsorption of ferric ion

    D)  absorption of ferric ion

    Correct Answer: C

    Solution :

     \[\text{Fe(OH}{{\text{)}}_{\text{3}}}\]sol carries charge because of the adsorption of ferric ions as \[Fe{{(OH)}_{3}}+FeC{{l}_{3}}\xrightarrow{{}}\underset{\text{sol}\,\text{of}\,\text{ferric}\,\text{hydroxide}}{\mathop{Fe{{(OH)}_{3}}:F{{e}^{3+}}}}\,\]\[+\,3C{{l}^{-}}\]


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