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Q.

Which of the following gases are released when magnesium reacts with hot boiled water?

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a

Oxygen

b

Hydride

c

Hydrogen

d

Oxide

answer is C.

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Detailed Solution

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When magnesium (Mg) reacts with hot boiled water, it releases hydrogen.
Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny grey solid that shares many physical and chemical properties with the other five alkaline earth metals (group 2 of the periodic table). Magnesium reacts with hot, boiling water to liberate hydrogen gas. Boiling water and magnesium react, forming Magnesium hydroxide

Mg {(OH)}_{2}

and releasing hydrogen gas.
Mg + 2H2O → Mg(OH)2 + H2

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