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Preparation of Hydrogen

Magnesium rea...

Question

Magnesium reacts with steam to form and .

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Solution

${M g}_{(s)} + H_{2} O_{(l)} ⟶ {M g O}_{(s)} + H_{2 (g)}$
Magnesium reacts with steam to form magnesium oxide and water.

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Q. Silica reacts with

M g

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reacts with dilute

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Q. Which among the following statements is incorrect for magnesium metal?

(a) It burns in oxygen with a dazzling white flame.
(b) It reacts with cold water to form magnesium oxide and evolves hydrogen gas.
(c) It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas.
(d) It reacts with steam to form magnesium hydroxide and evolves hydrogen gas.

Q. Magnesium combines with nitrogen to form a nitride, which reacts with water to form a colourless gas. The gas is:

Silica reacts with magnesium to form a magnesium compound

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reacts with dilute

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Q. From the metals-copper, iron, magnesium, sodium and zinc-select a different metal in each case which :
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(b) can form 2⁺ and 3⁺ ions.
(c) has a hydroxide that reacts with both acids and alkalis.
(d) does not react with cold water, but reacts with steam when heated.

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