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Preparation of Hydrogen from Cold Water and Metals

Metals react ...

Question

Metals react with water to form oxides or hydroxides and

A

Hydrogen

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B

Oxygen

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C

Carbon dioxide

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D

Carbon monoxide

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Solution

The correct option is C Hydrogen
Metals react with water to form metal oxides or metal hydroxide (froming an alkaline solution) and hydrogen gas.
$2 N a + 2 H_{2} O ⟶ 2 N a O H + H_{2}$
$2 K + H_{2} O ⟶ 2 K O H + H_{2}$
$C a + H_{2} O ⟶ C a (O H)_{2} + H_{2}$
$2 A l + 3 H_{2} O ⟶ A l_{2} O_{3} + H_{2}$
$3 F e + 4 H_{2} O ⟶ F e_{2} O_{3} + 4 H_{2}$
Magnesium requires the water to be in the form of steam for a clearly observable reaction to take place.

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Similar questions

When do metals form there oxide or hydroxide when reacted with water?

Q. When metal oxides or metal hydroxides react with ___, they form salt and water.

Q. When metal oxides or metal hydroxides react with acid, they form salt and X. What is X?

Q. Few statements regarding the properties of bases are given below. Mark the correct statements
(i) Sodium hydroxide and potassium hydroxide are soluble in water.
(ii) Calcium hydroxide and magnesium hydroxide are partially soluble in water.
(iii) All metallic hydroxides react with acids to form their respective metallic salts.
(iv) Metallic oxides are acidic oxides hence they react with acids to form salts.

Q. Statement 1: Basic anhydrides react in water to form bases.
Statement 2: Metallic oxides react with water to form solutions that have an excess of hydroxide ions.

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