Which among the following statements are correct for magnesium metal?

It burns in oxygen with a dazzling white flame.

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It does not reacts with oxygen.

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It reacts with hot water to form Magnesium hydroxide and evolves hydrogen gas.

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It reacts with steam to form Magnesium hydroxide and evolves hydrogen gas.

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Solution

The correct options are
A
It burns in oxygen with a dazzling white flame.

C
It reacts with hot water to form Magnesium hydroxide and evolves hydrogen gas.

Magnesium burns in oxygen with a dazzling white flame forming magnesium oxide. The reaction is given below:

$Mg (s) + O_{2} (g) \to 2 MgO (s)$

Magnesium does not react with cold water or steam. It reacts with hot water to form Magnesium hydroxide and hydrogen gas. The reaction is given below:

$Mg (s) + 2 H_{2} O (l) \to {Mg(OH)}_{2} (aq) + H_{2} (g)$

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Similar questions

Statement 1: Magnesium burns in air with a dazzling white flame.
Statement 2: Metal + Water $\to$ Metal oxide + Hydrogen

Write a balanced chemical equation for each of the following :

1. Carbon disulphide burns in air to give carbon dioxide and sulphur dioxide.

2. Calcium hydride reacts with water to form calcium hydroxide and hydrogen gas.

3. Methyl alcohol burns in air to form carbon dioxide and water.

4. Liquid hydrogen peroxide decomposes to give water and oxygen gas.

5. Aluminium hydroxide reacts with sulphuric acid to give ammonium sulphate and water.

6. Aluminium sulphate solution reacts with sodium hydroxide to form a precipitate of aluminium hydroxide.

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