Environmental Sciences, asked by azherpasha1981, 6 days ago

what chemical name is which we use on coin for needle test


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Answers

Answered by bikshampuram1988
4

Explanation:

Chemical Tests on Coins, Thus, when a cotton swab soaked in 15 M ammonia is rubbed over the surface of a copper-containing coin, any Cu2+ on the surface causes the cotton swab to turn a blue color as a result of Equation .

Answered by chandana7265
4

Answer:

. Thus, when a cotton swab soaked in 15 M ammonia is rubbed over the surface of a copper-containing coin, any Cu2+ on the surface causes the cotton swab to turn a blue color as a result of Equation 1.

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