Question

Which of the following statements is true?

a. Metal oxides are acidic in nature. b. Metal oxides are only basic in nature. c. Metal oxides are either basic or amphoteric in nature. d. Metal oxides are either acidic or amphoteric in nature.​

Answer 1

Answer:

(.a.). FALSE

(.b.). TRUE

(.c.). FALSE

(.d.). TRUE

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Answer 2

c. Metal oxides are either basic or amphoteric in nature.

• Generally, most of the metal oxides are basic. They react with acids to form salt and water.
• When these metal oxides react with water to form metal hydroxides then these metal hydroxides release OH- ions in solution which proves metal oxides are basic.
• Examples of basic metal oxides are Na2O, CuO etc.
• However, in some cases, metal oxides can react both with bases as well as acids. Such types of metal oxides are called Amphoteric oxides. One common example is Al2O3.
• Hence, metal oxides are either basic or amphoteric in nature.