Question

23. Boron combined with oxygen during glass making, creates glass that is *

O bluish in color
O shatter proof
O flexible
O heat resistant

Answer 1

Boron oxide is added to glass during the manufacturing process, it causes the glass to have a blue tint, increases its strength, and makes it more resistant to breaking and shattering, also increases the heat resistance of glass and makes it more flexible, allowing it to be bent without breaking.

Answer 2

Answer: heat resistant