Question

Which variety of glass is heat resistant? A. Hard glass B. Flint glass C. Pyrex glass D. Bottle glass

Answer 1

Hint: Glass is a non-crystalline, sometimes translucent amorphous solid with extensive physical, mechanical, and decorative applications in window panes, tableware, and optics, among other things. Glass is most often created by the accelerated cooling (quenching) of molten metal; however, certain glasses, such as volcanic glass, occur naturally. "Silicate glasses," built on the chemical compound silica (silicon dioxide, or quartz), the main constituent of sand, are the most familiar and traditionally the oldest forms of processed glass.

Complete answer:
HARD GLASS
Borosilicate glass, also known as "Strong Glass," is made mostly of silica and boron oxide. The thermal expansion coefficient of borosilicate glass is around one-third that of ordinary glass.
FLINT GLASS
Flint glass is a kind of optical glass with a high refractive index and dispersion. Flint glass is any extremely refractive lead-containing glass used to produce lenses and prisms in the optical glass industry. It's often used in telescope lenses because it absorbs much ultraviolet light but only a small amount of visible light.
PYREX GLASS
Pyrex is a heat-resistant glass. The Corning Glass Works corporation invented Pyrex glass, which is a borosilicate glass. Pyrex also has a low alkali content, which helps it prevent corrosion. Formers, fluxes, and stabilisers are among the components used in the production of Pyrex. Formers are crystalline materials that can be melted and cooled to form glass when heated to a high temperature. Fluxes assist in lowering the temperature needed for formers to melt. Stabilizers protect the integrity of glass by preventing it from breaking or cracking.
BOTTLE GLASS
A glass bottle is one that is made entirely of glass. Glass bottles come in a wide range of sizes, but the most popular sizes are between 200 millilitres and 1.5 litres. Glass bottles are commonly used for food condiments, beer, wine, cosmetics, pickling, and preservatives.

Note:
Pyrex is a heat-resistant glass. The Corning Glass Works corporation invented Pyrex glass, which is a borosilicate glass. Pyrex also has a low alkali content, which helps it prevent corrosion. Formers, fluxes, and stabilisers are among the components used in the production of Pyrex.