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Railways General Science & Technology Metals and Non-metals / धातु और अधातु Sample Paper Properties and Uses of Metals and Non-Metals Sample Test Paper-19

  • question_answer
    A student placed an iron nail in copper sulphate solution. He observed the reddish brown coating on the iron nail: Which is

    A)  Soft and dull

    B)  hard and flading

    C)  Smooth and shining

    D)  rough and granular

    Correct Answer: D

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