Which of the following substance(s) is/are produced by chemical reactions?
Answer & explanation
Correct answer: option 4
The correct answer is option 4. All of these.
A change in which one or more new substances are formed is called a chemical change. A chemical change is also called a chemical reaction.
A medicine is the end product of a chain of chemical reactions.
Useful new materials, such as plastics and detergents, are produced by chemical reactions.
Indeed, every new material is discovered by studying chemical changes.