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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 metal is left exposed to atmosphere for some time. It becomes coated with green basic carbonate. The metal must be

    A)  Ag      

    B)         Cu

    C)  Al                   

    D)  Zn

    Correct Answer: B

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