Question

Consider the following statements.

I. Pyrex glasses have boron oxide as main constituent besides silica.

II. Pyrex glasses have high thermal expansion, thus less vulnerable to cracking from thermal shock.

III. They are commonly used for reagent bottles, optical component and household cookware,

Which of the statement(s) given above is/are correct?

(a) I, II and III

(b) I and III

(c) II and III

(d) Only II

Answer 1

(b) I and III

Pyrex glasses have boron oxide as main constituent besides silica. They are commonly used for reagent bottles optical components and household cookwares.