Question

Which of these given options is/are properties of a chemical change?

• A. Both physical and chemical properties are changed.
• B. New substances are formed.
• C. Both a and b.
• D. Neither a nor b.

Answer 1

The correct option is C Both a and b.

A chemical reaction is characterized by:
Change in temperature
Change in colour
Change in state
Evolution of gas
Formation of precipitate
Formation of new substance

Both the properties mentioned above are seen in a chemical change. A chemical change is a type of change where the composition of the products formed is entirely different from that of the reactants.