Al 2 O 3-6 HCl - 2 AlCl 3-3 H 2 OAl 2 O 3-2 N aOH - 2 N aAlO 2- H 2 OSodium aluminate From the above reactions- you can conclude thatA- Aluminum oxide is amphoteric-B- Base contains H -C- Water is in between acid and base-D- Acid will give water-

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Byju's Answer

Standard VII

Chemistry

Amphoteric Oxides of Metals

Al 2 O 3+6 HC...

Question

${A l}_{2} O_{3}$ + $6 H C l$ $\to$ $2 A l {C l}_{3}$ + $3 H_{2} O$

${A l}_{2} O_{3}$ + $2 N a O H$ $\to$ $2 N a A l O_{2}$ + $H_{2} O$

(Sodium aluminate)

From the above reactions, you can conclude that _______.

Aluminum oxide is amphoteric.

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Acid will give water.

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Base contains H⁺.

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Water is in between acid and base.

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Solution

The correct option is A
Aluminum oxide is amphoteric.

Since aluminium oxide is reacting with both acid and base, it is an amphoteric oxide.

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Similar questions

Q. Assertion : Aluminum oxide react with acids as well as bases to produce salt and water
Reason : Aluminum oxide is amphoteric in nature.

Q. Give one example in each case:
(a) A basic oxide which is soluble in water.
(b) A hydroxide which is highly soluble in water.
(c) A basic oxide which is insoluble in water.
(d) A hydroxide which is insoluble in water.
(e) A weak mineral acid.
(f) A base which is not an alkali.
(g) An oxide which is a base.
(h) A hydrogen containing compound which is not an acid.

2 A l + 6 H C l \to 2 A l C l_{3} + 3 H_{2}

, in the given reaction oxidation state of

A l C l_{3}

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.

Give one example in each case :

(a) A basic oxide which is soluble in water,

(b) A hydroxide which is highly soluble in water,

(d) A hydroxide which is insoluble in water,

(e) A weak mineral acid,

(f) A base which is not an alkali,

(g) An oxide which is a base,

(h) A hydrogen containing compound which is not an acid,

(i) A base which does not contain a metal ion.

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Al2O3 + 6HCl → 2AlCl3 + 3H2O Al2O3 + 2NaOH → 2NaAlO2 + H2O (Sodium aluminate) From the above reactions, you can conclude that _______.

The correct option is A Aluminum oxide is amphoteric. Since aluminium oxide is reacting with both acid and base, it is an amphoteric oxide.

${A l}_{2} O_{3}$ + $6 H C l$ $\to$ $2 A l {C l}_{3}$ + $3 H_{2} O$

${A l}_{2} O_{3}$ + $2 N a O H$ $\to$ $2 N a A l O_{2}$ + $H_{2} O$

(Sodium aluminate)

From the above reactions, you can conclude that _______.

The correct option is A
Aluminum oxide is amphoteric.

Since aluminium oxide is reacting with both acid and base, it is an amphoteric oxide.