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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
    Silver articles become black on prolonged exposure to air. This is due to the formation of

    A)  \[A{{g}_{2}}O\]          

    B)  \[A{{g}_{2}}S\]

    C)  \[AgCN\]          

    D)  \[A{{g}_{2}}O\] and \[A{{g}_{2}}S\]

    Correct Answer: B

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