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प्रश्न
Metal oxides generally react with acids, but few oxides of metal also react with bases. Such metallic oxides are:
- MgO
- ZnO
- Al2O3
- Cao
पर्याय
I and II
II and III
III and IV
I and IV
उत्तर
II and III
Explanation:
Some metal oxides, such as aluminium oxide, zinc oxide shows both acidic as well as basic behaviour. Such metal oxides that react with both acids and bases to produce salt and water are known as amphoteric oxides.
Aluminium oxide reacts with base as follows:
\[\ce{Al2O3 + 2NaOH -> \underset{(Sodium aluminate)}{2NaAlO2} + H2O}\]
ZnO is an oxide that can react with base, as shown by the equation given below:
\[\ce{ZnO + 2NaoH -> Na2ZnO2 + H2O}\]
संबंधित प्रश्न
Give two examples of amphoteric oxides.
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What are amphoteric oxides?
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| Metal | Gas Evolved |
| Copper | Yes |
| Iron | Yes |
| Magnesium | No |
| Zinc | Yes |
Select the correct observation(s) and give chemical equation(s) of the reaction involved.
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