JEE Main & Advanced Chemistry Solutions / विलयन Question Bank Abnormal molecular mass

  • question_answer
    Which of the following salt has the same value of Van't Hoff factor \[i\] as that of \[{{K}_{3}}[Fe{{(CN)}_{6}}]\] [CBSE PMT 1994; AIIMS 1998]

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

    B)                 \[NaCl\]

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

    D)                                \[Al{{(N{{O}_{3}})}_{3}}\]

    Correct Answer: A

    Solution :

                \[{{K}_{4}}[Fe{{(CN)}_{6}}]\]dissociates as \[4{{K}^{+}}+{{[Fe{{(CN)}_{6}}]}^{4-}},\] thus 1 molecule dissociates into five particles in the similar way \[A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\] also gives five particles per molecule.


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