Question

when a magnesium ribbon burns brilliantly in air, physical change takes place true or false​

Answer 1

Answer:

HEY MATE HERE IS YOUR ANSWER

Explanation:

WHEN A MAGNESIUM RIBBON BURNS BRILLIANTLY IN AIR, PHYSICAL CHANGE DIDN'T TAKE PLACE.

CHEMICAL CHANGE TAKES PLACE IN THIS CASE. BECAUSE WHEN SOMTHING BURNS IT MEANS ITS WHOLE FORM IS CHANGING . CHANGES TAKES PLACE IN THIS WAY ARE CALLED CHEMICAL CHANGES

Here when magnesium ribbon burns it react with the oxygen found in the air to form a powdery ash called MAGNESIUM OXIDE.

CHEMICAL EQUATION OF BURNING OF MAGNESIUM RIBBON :

Mg + O2 MgO shows this reaction but it needs to be balanced to make 2Mg + O2 2Mgo.

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Answer 2

It's a chemical Change, not physical.

It's a reaction between magnesium and oxygen that Need energy to occur.