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NTSE Sample Paper NTSE SAT Practice Test-7

  • question_answer
    The greenish colour substance formed on the surface of copper when exposed to moist air for long time

    A) Combination of \[Cu{{(OH)}_{2}}\]and \[CuC{{O}_{3}}\]

    B) Combination of \[Cu{{(OH)}_{2}}\]and \[CuO\]

    C) Combination of \[Cu{{(OH)}_{2}}\]and \[C{{u}_{2}}O\]

    D) Combination of CuO and \[CuC{{O}_{3}}\]

    Correct Answer: A

    Solution :

    [a] A fibre obtained by chemical treatment of wood pulp


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