Question

what happens on heating a platinum wire​

Answer 1

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.