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Standard X

Chemistry

Amphoteric Metals Reaction

What happens ...

Question

What happens when aluminium reacts with boiling dil. KOH?

Aluminium hydroxide and hydrogen is formed.

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Aluminium hydroxide and water is formed.

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Potassium meta aluminate and water is formed.

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Potassium meta aluminate and hydrogen is formed.

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Solution

The correct option is D
Potassium meta aluminate and hydrogen is formed.

Aluminium reacts with boiling and dilute KOH to form potassium meta aluminate and liberate hydrogen gas.

$2 A l + 2 K O H + 2 H_{2} O \to 2 K A l O_{2} + 3 H_{2}$

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Similar questions

Aluminium oxide reacts with potassium hydroxide to form white salt and water. What is the nature of aluminium oxide?

The salt formed when aluminium oxide reacts with potassium hydroxide is:

Write the balanced chemical equations of the following reactions.

(a) Sodium hydroxide + sulphuric acid $\to$ sodium sulphate + water

(b) Potassium bicarbonate + sulphuric acid $\to$ potassium sulphate + carbon dioxide + water

(d) Chlorine + sulphur dioxide + water $\to$ sulphuric acid + hydrogen chloride

(e) Silver nitrate $\to$ silver + nitrogen dioxide + oxygen

(f) Copper + nitric acid $\to$ copper nitrate + nitric oxide + water

(g) Ammonia + oxygen $\to$ nitric oxide + water

(h) Barium chloride + sulphuric acid $\to$ barium sulphate + hydrochloric acid

(i) Zinc sulphide + oxygen $\to$ zinc oxide + sulphur dioxide

(j) Aluminium carbide + water $\to$ aluminium hydroxide + methane

(k) Iron pyrites ( $F e S_{2}$ ) + oxygen $\to$ ferric oxide + sulphur dioxide

(l) Potassium permanganate + hydrochloric acid $\to$ potassium chloride + manganese chloride + chlorine + water

(m) Aluminium sulphate + sodium hydroxide $\to$ sodium sulphate + sodium meta aluminate + water.

(n) Aluminium + sodium hydroxide + water $\to$ sodium meta aluminate + hydrogen

(o) Potassium dichromate + sulphuric acid $\to$ potassium chloride + chromium chloride + water + chlorine.

(p) Sulphur + nitric acid $\to$ sulphuric acid + nitrogen dioxide + water.

(q) Sodium chloride + manganese dioxide + sulphuric acid $\to$ sodium hydrogen sulphate + manganese sulphate + water + chlorine.

What happens when sodium meta aluminate is diluted with water?

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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What happens when aluminium reacts with boiling dil. KOH?

The correct option is D Potassium meta aluminate and hydrogen is formed. Aluminium reacts with boiling and dilute KOH to form potassium meta aluminate and liberate hydrogen gas. 2Al+2KOH+2H2O→2KAlO2+3H2

The correct option is D
Potassium meta aluminate and hydrogen is formed.

Aluminium reacts with boiling and dilute KOH to form potassium meta aluminate and liberate hydrogen gas.

$2 A l + 2 K O H + 2 H_{2} O \to 2 K A l O_{2} + 3 H_{2}$