Question

[A]. When magnesium burns in air.

[B]. When magnesium burns underwater.

[C]. When ash of magnesium dissolve in water.

[D]. When hydrogen and oxygen both react with magnesium

Answer 1

Answer:

A compound is a material in which atoms of different elements are bonded to one another. Oxygen and magnesium combine in a chemical reaction to form this compound.

it will form a hydrogen gas that ignites violently due to the excessive heat and oxygen supply. When it reacts, it will burn hot enough to decrease the water molecule, which turns to a Hydrogen Gas

Answer 2

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• Magnesium hydroxide is a base.
• 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. Hence it is a chemical change.