blackining of silver ornaments is chemical or physical change ? why?
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The metal silver does not rust, but eventually a darker substance called tarnish forms on its surface. The chemical propertiesof copper cause it to become a blue-green color when it is exposed to air. ... A chemical change affects the substances involved in the change.
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Answer:
chemical change
Explanation:
as siver react with atmospheric oxygen and forms silver oxide . which results in blackening of silver.
this can be removed by some methods..
or by using lyophobic sols.
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