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JEE Main & Advanced Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank Compounds of Transitional Elements

  • question_answer
    A metal when left exposed to the atmosphere for some time becomes coated with green basic carbonate. The metal in question is [NDA 1999]

    A) Copper

    B) Nickel

    C) Silver

    D) Zinc

    Correct Answer: A

    Solution :

    \[2Cu+C{{O}_{2}}+{{H}_{2}}O+{{O}_{2}}\to \underset{\text{Basic copper carbonate}}{\mathop{CuC{{O}_{3}}.Cu{{(OH)}_{2}}}}\,\]


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