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NEET Sample Paper NEET Sample Test Paper-8

  • question_answer
    Ammonium dichromate is used in some fire works. The green coloured powder blown in the air is:

    A)  \[Cr{{O}_{3}}\]                   

    B)  \[C{{r}_{2}}{{O}_{3}}\]

    C)  \[Cr\]                          

    D)  \[CrO({{O}_{2}})\]

    Correct Answer: B

    Solution :

    \[{{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\xrightarrow{\Delta }C{{r}_{2}}{{O}_{3}}+4{{H}_{2}}O+{{N}_{2}}\uparrow \] Hence, green coloured powder blown in the air is \[C{{r}_{2}}{{O}_{3}}\].


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