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Science Bowl Question

📅 NSB 2011 Set 4🎓 HS🔄 Round 6#️⃣ Question 18🌟 Bonus📝 Multiple Choice

Which of the following BEST describes the function of boric acid in the manufacture of Pyrex or borosilicate glass:

W) makes the glass more scratch-resistant
X) makes the glass more brittle
Y) reduces the linear coefficient of expansion of the glass
Z) reduces the effect of detrimental ultraviolet light exposure
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