Question

How can you prove that metal oxide are basic in nature?

Answer 1

when metallic oxides react with water they form metallic hydroxides which are basic in nature.to show that these are basic in nature,we should conduct a litmus paper test.in this experiment,we will observe that red litmus turns blue on coming in contact with them.this shows that metallic oxides are basic in nature.

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Answer 2

The oxide ions in a metal oxide generally react with water to form hydroxide ions which are basic in nature (OH-). ... Some other metal oxides (like ZnO and Al2O3) are basic but also acidic oxides: ZnO + H2O + 2 OH- --> Zn(OH)42- in which reaction hydroxide is needed and not formed!

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