Is 'reacts with air' considered a physical property or a chemical property?

• A. Chemical property
• B. Physical property
• C. Neither physical nor chemical property
• D. Both physical and chemical property

Answer: (A)

Verified step by step guidance

1. Understand the difference between physical and chemical properties: Physical properties can be observed or measured without changing the substance's identity, such as color, melting point, or density. Chemical properties describe a substance's ability to undergo changes that transform it into different substances.
2. Analyze the phrase 'reacts with air': This implies that the substance undergoes a chemical reaction when exposed to air, resulting in a new substance or substances.
3. Since reacting with air changes the chemical composition of the original substance, it is an example of a chemical property rather than a physical property.
4. Physical properties do not involve a change in chemical identity, so 'reacts with air' cannot be classified as a physical property.
5. Therefore, the correct classification for 'reacts with air' is a chemical property.