A lady's 18 carat gold wedding ring has ...

A lady's 18 carat gold wedding ring has become discoloured with some minutr drops of mercury from a broken thermometer. Which of the following treatments would restore it to its original condition :

A

Place it in hot strong nitric acid

B

Place it in cold diulite hydrochloric acid

C

Heat it gently in a sand - bath

D

Heat it in chlorine

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Verified by Experts

The correct Answer is:

C

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