Q10Engineering Chemistry
Question
2 marks
Q.10 List any four types of glasses.
Answer
Four absolutely distinct industrial classifications of manufactured glass include standard Soda-Lime glass, highly thermal-resistant Borosilicate glass, extremely heavy Lead (Flint) glass, and specialized high-strength Safety glass.
Glass is a massive, completely amorphous, supercooled liquid solid strictly possessing zero distinct crystalline structure.
- Soda-Lime Glass (Soft Glass): The absolute most common and universally cheap glass, strictly used for standard window panes and commercial bottles.
- Borosilicate Glass (Pyrex/Jena): Heavily alloyed with boron oxide (), giving it an incredibly low coefficient of thermal expansion. Strictly used for robust laboratory chemical apparatus and severe high-temperature ovenware.
- Lead Glass (Flint Glass): Contains massive quantities of heavy lead oxide (). It possesses an extraordinarily high refractive index, strictly utilized for expensive decorative crystal ware and high-end optical lenses.
- Safety Glass (Laminated/Tempered): Highly specialized glass rigidly engineered to strictly resist massive impact. If severely broken, it violently shatters into completely blunt, harmless granular cubes rather than dangerously sharp, lethal shards.