Question

which of these is a chemical change ?
(1) stretching a string of a guitar
(2) cutting a paper
(3) Inflating a football
(4) Burring of coal​

Answer 1

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Burning of coal is a chemical change because in other options only physical properties of the substances will change no new substance will be form therefore we can consider burning of coal as only the given option that shows chemical change

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Answer 2

Answer:

burning of coal

Explanation:

in other option,there will no new substance will form

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