NEET Chemistry (general) MCQ Question
Which of the following combinations about oxides and their characteristics is correct?
Non-metal oxides are usually acidic. 2) Metal oxides can also be acidic if in high oxidation states. 3) Oxides can be simple or mixed. 4) All metal oxides are basic.
Non-metal oxides are always basic. 2) Simple oxides cannot be classified. 3) Mixed oxides do not exist. 4) Oxides of metals are always acidic.
Only non-metal oxides are acidic. 2) Oxides can only be simple. 3) Oxides vary in nature and properties. 4) Mixed oxides are only formed by transition metals.
Acidic oxides combine with bases to form salts. 2) Metal oxides in low oxidation states are always basic. 3) Non-metal oxides usually have amphoteric character. 4) Oxides can be both acidic and basic.
Correct Answer
Detailed Explanation
Statement 1 is true as non-metal oxides are generally acidic. Statement 2 is valid since some metal oxides in high oxidation states can exhibit acidic character. Statement 3 is correct as oxides can be classified into simple and mixed. Statement 4 is incorrect because not all metal oxides are basic.
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