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VMMC VMMC Medical Solved Paper-2006

  • question_answer
    \[4{{K}_{2}}C{{r}_{2}}{{O}_{7}}\xrightarrow{\text{heat}}4{{K}_{2}}Cr{{O}_{4}}+3{{O}_{2}}+X.\] 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 \[(C{{r}_{2}}{{O}_{3}}).\] \[4{{K}_{2}}C{{r}_{2}}{{O}_{7}}\xrightarrow{\Delta }4{{K}_{2}}Cr{{O}_{4}}+3{{O}_{2}}+2C{{r}_{2}}{{O}_{3}}\]


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