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7th Class Science Sample Paper Science Olympiad Model Test Paper-10

  • question_answer
    An element X reacts with oxygen to form Y which turns red litmus to blue, then:

    A) X is a metal and Y is acidic oxide.

    B) X is a non-metal and Y is basic oxide.

    C) X is a metal and Y is basic oxide.

    D) X is a non-metal and Y is acidic oxide.

    E) None of these

    Correct Answer: C

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