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What are amphoteric oxides? Give two examples of amphoteric ox

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(a) How could you use them to distinguish between samples of metals and non-metals?
(b) Assess the usefulness of these tests in distinguishing between metals and non-metals.

What are amphoteric oxides? Give two examples of amphoteric oxides.

Name two metals which will displace hydrogen from dilute acids and two metals which will not.

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Solving time: 3 mins

What are amphoteric oxides? Give two examples of amphoteric oxides.

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Updated on: May 10, 2023

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Science (NCERT)

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Text solutionVerified

An amphoteric compound is a molecule or ion that can react both as an acid as well as a base. Many metals (such as copper, zinc, tin, lead, aluium, and beryllium) form amphoteric oxides or hydroxides. Amphoterism depends on the oxidation state of the oxide.

Zinc oxide

(Z n O)

reacts with both acids and with bases:

In acid:

Z n O + 2 H^{+} \to Z n^{2 +} + H_{2} O

In base:

Z n O + H_{2} O + 2 O H^{-} \to [Z n (O H)_{4}]^{2 -}

Aluium oxide

with acid:

A l_{2} O_{3} + 3 H_{2} O + 6 H_{3} O^{+} (a q) \to 2 [A l (H_{2} O)_{6}]^{3 +} (a q)

with base:

A l_{2} O_{3} + 3 H_{2} O + 2 O H^{-} (a q) \to 2 [A l (O H)_{4}]^{-} (a q)

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Practice more questions from Science (NCERT)

You are given a hammer, a battery, a bulb, wires and a switch.

(a) How could you use them to distinguish between samples of metals and non-metals?
(b) Assess the usefulness of these tests in distinguishing between metals and non-metals.

What are amphoteric oxides? Give two examples of amphoteric oxides.

Name two metals which will displace hydrogen from dilute acids and two metals which will not.

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Question Text	What are amphoteric oxides? Give two examples of amphoteric oxides.
Updated On	May 10, 2023
Topic	Metals and Non-metals
Subject	Science
Class	Class 10
Answer Type	Text solution:1 Video solution: 4
Upvotes	466
Avg. Video Duration	4 min

What are amphoteric oxides? Give two examples of amphoteric oxides.

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