This is the process of matter changing from the liquid to the solid state? its melting

False; it's freezing

Explanation:

Melting is when something turns from solid to liquid, like ice melting into water. Going from liquid to solid would be freezing.

alchemy hadn't scientific methods of study, appeal to mysticism and fantasy, the knowledge of chemistry and physics were modest at that time.

alchemy was - but as new rules were discovered it either changed into chemistry or it became "unscientific".