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Pyroceram glass softens above ______

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Pyroceram glass softens above ______

(a) 1000^oC

(b) 2000^oC

(c) 4500^oC

(d) 5500^oC

This question was posed to me by my college director while I was bunking the class.

Question is taken from Insulating Materials in division Magnetic & Insulating Materials of Engineering Material & Metallurgy

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Right option is (b) 2000^oC

To explain I would say: Pyroceram is a common glass type of crystalline glass. This crystalline glass softens above 2000oC  and has a low specific heat of about 0.1.

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