Question

classify the following changes into chemical and physical changes
1.stretching a rubber band
2 burning of a piece of magnesium ribbon. ​

Answer 1

Answer:

Question:

classify the following changes into chemical and physical changes

1.stretching a rubber band

$\color{blue}{physical change}$

2 burning of a piece of magnesium ribbon.

$\color{blue}{chemicalchange}$

Explanation:

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Answer 2

Answer:

Stretching a piece of rubber band is a physical change and burning a piece of magnesium ribbon is a chemical change.

Explanation:

Stretching a piece of rubber band doesn't cause any change in it to form a new substance. But, when we burn a magnesium ribbon, new substance is formed, i.e. magnesium ribbon.