Which statement is incorrect about chemical reactions?

کیمیائی رد عمل کے بارے میں کون سا بیان غلط ہے؟

States of matter does not change during chemical reactions

Chemical reactions produce new substances

Chemical reactions occur with the absorption or emission of energy

Chemical reactions may be fast, moderate or slow

The incorrect statement is: States of matter does not change during chemical reactions.
During chemical reactions, states of matter can change.
For example, a solid may dissolve in a liquid, a liquid may vaporize, or a gas may condense into a liquid.