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NTSE Sample Paper NTSE SAT Practice Test-16

  • question_answer
    When Cu is heated in the presence of \[{{O}_{2}}\]

    A) Green coating \[(CuC{{O}_{3}})\]is formed

    B) Black coating (CuO)

    C) Blue coating \[(CuC{{O}_{4}})\]is formed

    D) None of the above

    Correct Answer: B

    Solution :

    [b] CuO is black in colour


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