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J & K CET Engineering J and K - CET Engineering Solved Paper-2005

  • question_answer
    \[\text{Cr}{{\text{O}}_{\text{3}}}\]dissovles in aqueous \[\text{NaOH}\]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 :

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


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