Question

when magnesium is burnt in air a new substance is formed which is________​

Answer 1

Answer:

Magnesium oxide

Explanation:

Magnesium hydroxide is a base.  

Magnesium oxide is a new substance formed on burning of magnesium. Magnesium hydroxide is another new substance formed by mixing magnesium oxide with water.

Answer 2

Magnesium Oxide

When the magnesium metal burns it reacts with oxygen found in the air to form Magnesium Oxide, which is a compound. A compound is a material in which atoms of different elements are bonded to one another. Oxygen and magnesium come together in a chemical reaction to form this compound.

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