Discussion
Among the following, which is the chemical property of matter ?
Answer: A
The key gives Composition.
Chemical properties describe how a substance's make-up changes in reactions, such as flammability or reactivity, and they are tied to its chemical composition. Composition can be determined only by changing the substance chemically, which is why it is grouped with chemical properties.
Melting point, odour and density are physical properties: they can be observed or measured without changing what the substance is made of.
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