JEE Main & Advanced Chemistry Equilibrium Question Bank Common ion effect, Isohydric solutions, Solubility product, Ionic product of water and salt hydrolysis

  • question_answer On the addition of a solution containing \[Cr{{O}_{4}}^{2-}\]ions to the solution of \[B{{a}^{2+}},\,\,S{{r}^{2+}}\] and \[C{{a}^{2+}}\]ions, the precipitate obtained first  will be of         [MP PMT 1993]

    A)                 \[CaCr{{O}_{4}}\]            

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

    C)                 \[BaCr{{O}_{4}}\]            

    D)                 Mixture of A, B, C

    Correct Answer: C

    Solution :

               When we added barium ion in chromate ion solution we obtained yellow ppt of \[BaCr{{O}_{4}}\].                                 \[BaC{{l}_{2}}+{{K}_{2}}Cr{{O}_{4}}\to \underset{\text{Yellow ppt}\text{.}}{\mathop{BaCr{{O}_{4}}}}\,\downarrow +\,2KCl\]

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