JEE Main & Advanced Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank Compounds of Transitional Elements

  • question_answer
    Which of the followign is the green coloured powder produced when ammonium dichromate is used in fire works [J & K  2005]

    A) \[Cr\]

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

    C) \[C{{r}_{2}}{{O}_{3}}\]

    D) \[CrO({{O}_{2}})\]

    Correct Answer: C

    Solution :

    \[{{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\xrightarrow{\Delta }2{{K}_{2}}Cr{{O}_{4}}+C{{r}_{2}}{{O}_{3}}+\frac{3}{2}{{O}_{2}}\]


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