Question

1. Which of these is a chemical change?
a. A substance with different chemical properties is formed.
b. A substance in a different state but similar chemical properties is formed.
c. The molecules of the substances do not undergo any change.
d. A substance with a different shape and size but similar chemical properties is formed.​

Answer 1

Answer:

a is answer.....

Answer 2

(a) A substance with different chemical properties is formed.