Question

What are the properties of a chemical reaction?

Answer 1

There is vast difference between a physical change and a chemical change. Usually, physical changes are reversible and chemical changes are irreversible. Chemical reactions change the chemical properties of the substances participating in the reaction.

Complete answer:
A chemical property is the ability (or inability) to transform one form of matter into another. Flammability, toxicity, acidity, reactivity (of various types), and heat of combustion are examples of chemical properties. In the presence of water, iron, for example, reacts with oxygen to produce rust.
A chemical reaction is another term for a chemical transition. When one or more substances are converted into one or more new substances, it is called a chemical reaction. A chemical reaction can be characterized by the following points:
Change in temperature: An increase or decrease in temperature indicates a chemical reaction. The reactants may combine to form a new product, thus allowing a change in temperature.
Change in color: Another sign that a chemical reaction is taking place is a shift of color. For instance, observing the rusting of metal over time can reveal that the metal has changed color and turned orange.
Noticeable odor: If any kind of odor is generated during a reaction, it is highly possible that it is a chemical reaction.
Formation of precipitate or bubbles: Chemical reactions sometimes produce a precipitate that does not dissolve in the final product. These are known as precipitation reactions. Formation of bubbles, indicating the release of a gas, can also take place.

Note:
There is a variation in the composition of the substances in question in a chemical reaction; there is a difference in the shape, scent, or clear presentation of a sample of matter in a physical reaction without a change in composition. Despite the fact that we call them "reactions," no reaction takes place in a physical reaction.