Why is ZnO called an amphoteric oxide? Name another amphoteric oxide?

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Solution

Zinc oxide (ZnO) is called amphoteric oxide as it behaves both as acidic oxide and basic oxide.

$Z n O$ + $2 H C l$ $\to$ $Z n {C l}_{2}$ + $H_{2} O$

Basic oxide Acid Zinc chloride

$Z n O$ + $2 N a O H$ $\to$ ${N a}_{2} Z n O_{2}$ + $H_{2} O$

Acidic oxide Base Sod. Zincate

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Q. Which of the following oxide is an amphoteric oxide?

S n O

is called an amphoteric oxide. Give an explanation for it.

Q. Name the following:
Metals which forms an amphoteric oxide.

A white amphoteric oxide reacts with sodium hydroxide to give sodium zincate and water. Name this amphoteric oxide.

(a) What are amphoteric oxides? Give two examples of amphoteric oxides.
(b) Choose the acidic oxides, basic oxides and neutral oxides from the following:
$N a_{2} O : C O_{2}; C O; S O_{2}; M g O; N_{2} O; H_{2} O .$
(c) Which of the following are amphoteric oxides:
$M g O, Z n O, P_{2} O_{3}, A l_{2} O_{3}, N O_{2}$

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Why is ZnO called an amphoteric oxide? Name another amphoteric oxide?

Zinc oxide (ZnO) is called amphoteric oxide as it behaves both as acidic oxide and basic oxide. ZnO + 2HCl → ZnCl2 + H2O Basic oxide Acid Zinc chloride ZnO + 2NaOH → Na2ZnO2 + H2O Acidic oxide Base Sod. Zincate

Zinc oxide (ZnO) is called amphoteric oxide as it behaves both as acidic oxide and basic oxide.

$Z n O$ + $2 H C l$ $\to$ $Z n {C l}_{2}$ + $H_{2} O$

Basic oxide Acid Zinc chloride

$Z n O$ + $2 N a O H$ $\to$ ${N a}_{2} Z n O_{2}$ + $H_{2} O$

Acidic oxide Base Sod. Zincate