Question

which of the following is responsible for the extra strength of Pyrex glass?
A) potassium carbonate
B) lead oxide
C) borax
D) ferric oxide

Answer 1

(c) borax............

Answer 2

Answer:

Borax or borosilicate is responsible for the extra strength of Pyrex glass and makes it stronger about 4-6 times than regular glass.

Explanation:

• It makes the Pyrex glass to be resistant to heat, shocks, chemicals and scratches.
• Pyrex glass is a tempered glass used for specific purposes like in cooking and baking ware, laboratory glassware, solar arrays etc.
• The low coefficient expansion and controlled thermal expansion of Borax controls the expansion or contraction after a heating or cooling process which makes the Pyrex glass to be more resistant to breaks during cooking over hot stove or baking in hot ovens and then while cooling over the countertop.