Which among the following statements is incorrect for magnesium metal?

It burns in oxygen with a dazzling white flame

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It reacts with cold water to form magnesium oxide and evolves hydrogen gas

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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 option is D It reacts with cold water to form magnesium oxide and evolves hydrogen gas
Magnesium never reacts with cold water. It only reacts with hot water or steam to form its hydroxide and hydrogen gas is evolved.

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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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