Its C. Two solids
I'm pretty sure its c because then you have to melt the solid
The answer to 1 is D the answer to 2 is B the answer for 3 is C the answer to 4 is A and the answer to 5 is c or b
Al2so4+NaOH =Naso4+AlOH= so I think it’s B not sure
A physical change is a change that can be fixed like cutting wood or tearing paper, or breaking a bone, on the flip side chemical changes cannot be undone, this is like rust on a nail