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Manipal Medical Manipal Medical Solved Paper-2005

  • question_answer
    \[4K{{  }_{2}}C{{r}_{2}}{{O}_{7}}\xrightarrow[{}]{Heat}4{{K}_{2}}Cr{{O}_{4}}+3{{O}_{2}}+X.\] In the above reaction X is:

    A)  \[Cr{{O}_{3}}\]

    B)  \[C{{r}_{2}}{{O}_{7}}\]

    C)  \[C{{r}_{2}}{{O}_{3}}\]

    D)  \[Cr{{O}_{5}}\]

    Correct Answer: C

    Solution :

     Potassium dichromate, on heating gives oxygen and chromic oxide\[(C{{r}_{2}}{{O}_{3}})\]. \[4{{K}_{2}}C{{r}_{2}}{{O}_{7}}\xrightarrow[{}]{{}}4{{K}_{2}}Cr{{O}_{4}}+3{{O}_{2}}+2C{{r}_{2}}{{O}_{3}}\]


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