Which one of the following statements about glass is not correct?

Glass is an amorphous solid, often described as a supercooled liquid because it lacks a long-range crystalline structure and flows extremely slowly over time. Due to this amorphous nature, glass does not possess a definite melting point but instead softens gradually over a temperature range. Pyrex glass is a brand traditionally associated with borosilicate glass, which contains approximately 13% boron trioxide. Borosilicate glass (Pyrex) is significantly harder and more durable than soda-lime glass (common soda glass) because its composition, featuring silica and boron, provides superior thermal and chemical resistance. Soda-lime glass is the most common type used for windows and bottles but is softer and more prone to thermal shock compared to the borosilicate variety. Therefore, the statement that soda glass is harder than Pyrex glass is incorrect.