Question

When a substance dissolves, it undergoes a _____.

chemical change
physical change
molecular change

Answer 1

The answer is a physical change. Hope this helps and have an amazing day. :)

Answer 2

A physical change.  chemical changes require the molecule itself to change.  If you put NaCl into solution, the NaCl is still there which is evident by the fact that if you lower the amount of water, NaCl precipitates out.