__________ glass is used for the manufacture of optical glass. (A) Pyrex (B) Soda (C) Flint (D) Crooke's

__________ glass is used for the manufacture of optical glass.
(A) Pyrex
(B) Soda
(C) Flint
(D) Crooke's
by

1 Answer

Answer :

(C) Flint
by

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The glass known as Pyrex?

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