Question

expansion and contraction of a metal on heating and cooling respectively are physical change? give reason​

Answer 1

Answer:

Expansion and contraction of aetal on heating and cooling are physical changes because the expansion and contraction does not causes any chemical changes in a metal and also contraction and expansion does not produces any other element with different chemical properties.

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Answer 2

Answer

Explanation

It is a physical change because metal expands on heating and also contracts on cooling, so it is a reversible change and can be considered as physical change.