Question

Common glass is mainly a mixture of ___________

(a) Calcium silicate, potassium silicate and copper silicate

(b) Sodium silicate, iron silicate and calcium silicate

(c) Aluminium silicate, potassium silicate and iron silicate

(d) Magnesium silicate, potassium silicate and zinc silicate

Answer 1

Correct choice is (b) Sodium silicate, iron silicate and calcium silicate

To explain I would say: Common glass is mainly a mixture of sodium silicate, iron silicate and calcium silicate. It is usually available in green, brown or yellow colour.