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CMC Medical CMC-Medical Ludhiana Solved Paper-2011

  • question_answer
    \[Cr{{O}_{3}}\] dissolves in aqueous\[NaOH\]to give

    A)  \[CrO_{4}^{2-}\]                             

    B)  \[Cr(OH)_{3}^{-}\]

    C)  \[C{{r}_{2}}O_{7}^{2-}\]                              

    D)  \[Cr{{(OH)}_{2}}\]

    Correct Answer: A

    Solution :

                    \[Cr{{O}_{3}}\]dissolves in aqueous\[NaOH\]to give sodium chromate. \[Cr{{O}_{3}}+2NaOH\xrightarrow{{}}\underset{sodium\,\,chormate}{\mathop{N{{a}_{2}}Cr{{O}_{4}}}}\,+{{H}_{2}}O\]


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