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Q. What is formed when Magnesium is burnt?
Answer: Ash
Notes: When Magnesium burns in air it reacts with oxygen present in air to form magnesium oxide: Magnesium oxide is a crumbly, whitish powder that looks like ash. The formation of magnesium oxide is a direct combination reaction of two elements magnesium and oxygen.

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Question Number: 52 in Chemistry-11-Chemical Reactions in above course in App.