Question

A chemical change occurs when ________.

there is a change in the shape of a substance
there is a change in a state of a substance
there is a large increase in the size of the substance
there are one or more new substances with new properties formed

Answer 1

the answer is b. welcome

Answer 2

There are one or more new substances with new properties formed.

Step-by-step explanation:

Its a chemical change when a new substance is created with new properties.

Iron Rusting is an example since it cant revert into it's past form.