*WILL GIVE BRAINLIEST IF SOMEONE ANSWERS THIS CORRECTLY ASAP!!!!*

Jerome observes that a gas is formed when two liquids are mixed together. Which of the following best names and explains the change that causes the formation of the gas?

Chemical change, because a substance in a state different from the state of the original substances is formed
Physical change, because a substance in a state different from the state of the original substances is formed
Chemical change, because mixing only changes the form of the substances but not their identity
Physical change, because mixing only changes the form of the substances but not their identity