what happens on heating a platinum wire
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Explanation:
A chemical change involves changing what makes up the substance or the way the substance reacts with other substances. When a normal platinum wire is placed over a flame, it glows. This is a physical change because the things that make up the platinum have not been changed, but the appearance has changed.
It is a physical change because the original substance platinum remains same as the final product platinum, so there is no change in composition and properties.
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