A vessel is exposed to moist air for a long time. It acquires a dull, green…

PYQ SSC JE (Junior Engineer) 2022

A vessel is exposed to moist air for a long time. It acquires a dull, green coating. What is the vessel made up of?

  1. A.

    Copper

  2. B.

    Gold

  3. C.

    Iron

  4. D.

    Phosphorus

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