Question

A student burnt a ribbon of metal X. It burnt with a dazzling flame and a white powder is formed. Which type of reaction is this : decomposition or combination? Give reason for your answer.​

Answer 1

Answer:

Magnesium burns with a dazzling white flame. So, metal X is magnesium. So, its a combination reaction. As oxygen in air combines with magnesium to form magnesium oxide.

Chemical Equation :- In the attachment.

Hope it helps you. ☺

Answer 2

Answer:

The substance X is Magnesium (Mg) and the reaction is a Combination and an Oxidation reaction.

Explanation:

As Magnesium reacts with Oxygen to give Magnesium oxide, it is a combination reaction.

2Mg(s) + O₂ ⇒ 2MgO