Correct Answer: C. Low thermal expansion coefficient
Solution:
Borosilicate glass is highly resistant to thermal shock because it has a very low coefficient of thermal expansion. This means it expands and contracts very little when exposed to rapid temperature changes, which prevents the buildup of internal stresses that would cause other types of glass to crack.
Correct Answer: B. Facades and windows
Solution:
Lead glass, also known as crystal glass, has a high refractive index, making it sparkle. While it's used for decorative items, in construction, it's valued for its radiation-shielding properties (e.g., in X-ray rooms) and for high-quality decorative facades and windows where clarity and a brilliant appearance are desired.
Correct Answer: A. Soda
Solution:
Soda (sodium carbonate) is added as a flux in glass manufacturing. It lowers the melting point of silica, accelerating the fusion process and making it more economical. However, an excess of soda makes the glass less durable and susceptible to attack by water.
Correct Answer: C. High strength plastic
Solution:
Bullet-resistant glass is a laminate made of multiple layers of glass bonded together with a transparent, high-strength plastic interlayer, typically polyvinyl butyral (PVB) or polycarbonate. This plastic layer absorbs the energy of an impact and prevents the glass from shattering dangerously.