Question

Which of the following is not true for a chemical change?

• A. New substances are formed
• B. They are irreversible
• C. Chemical properties of new substance are same
• D. Chemical properties of new substance are different

Answer 1

The correct option is C Chemical properties of new substance are same

1) A chemical change is a permanent and not easily reversible.
2) A chemical change results in an alteration in the composition of the molecules of the substance undergoing change and the formation of one or more new substances.
3) The mass of the substance undergoing a chemical change usually changes.
4) Heat is either absorbed or given out during a chemical change.