Question

Which of the following does not happen during a chemical change?

A- New bonds are formed.

B- The identities of the substances change.

C- Compounds are broken down.

D- The total mass increases.

Answer 1

B would be the best choice

though the identities of substances will not always change for example ice melting turns into water doesn't mean the identity of the substance changed, it is still H2O

Answer 2

The answer is C :) Hope this helps!!