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NTSE Sample Paper NTSE SAT Practice Test-8

  • question_answer
    When copper wire is heated, its surface turns into black due to the formation of

    A) CuO                           

    B) \[C{{u}_{2}}O\]

    C) \[C{{u}_{2}}S\]                    

    D) \[CuS\]

    Correct Answer: A

    Solution :

    [a] CuO is black in colour


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