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9th Class Science Atoms and Molecules Question Bank Atoms and Molecules

  • question_answer
    If the formula of chromic acid is \[{{H}_{2}}Cr{{O}_{4}}\], then what is the formula of divalent metal chromate?

    A) \[MCr{{O}_{4}}\]           

    B)        \[{{M}_{2}}Cr{{O}_{4}}\]

    C) \[{{M}_{2}}{{(Cr{{O}_{4}})}_{3}}\]   

    D)        \[{{M}_{3}}Cr{{O}_{4}}\]

    Correct Answer: A

    Solution :

     From the formula of chromic acid\[{{H}_{2}}Cr{{O}_{4}}\],  the valency of chromate ion is two and the formula of divalent metal chromate is\[MCr{{O}_{4}}\].


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