___________________ glass is used for the manufacture of optical glass ?

Related Mcqs:

1. Type of glass used in optical work is the ___________________ glass?

   A. Soda-lime
   B. Fibre
   C. Lead
   D. Borosilicate

2. The type of high refractive index glass used in optical instruments is _____________ glass?

   A. Pyrex
   B. Flint
   C. Crookes
   D. None of these

3. Coloured glass is obtained by mixing of colored salts. Addition of ___________________ oxide is done to impart greenish blue color to the glass?

   A. Chromium
   B. Arsenic
   C. Copper
   D. Manganese

4. Which glass is usually used in optical work ?

   A. Lead glass
   B. High silica (borosilicate) glass
   C. Photo-sensitive glass
   D. Fibre glass

5. Laboratory glass wares which reacts with hydrofluoric acid, are made of the ______________ glass?

   A. Lead
   B. Borosilicate
   C. Soda lime
   D. Alkali silicate

6. Commonly used glass is known as the _______________ glass?

   A. Flint
   B. Hard
   C. Pyrex
   D. Soda

7. Which of the following is not a raw material used for the manufacture of ordinary glass ?

   A. Iron oxide
   B. Soda ash
   C. Limestone
   D. Silica

8. Co-efficient of thermal expansion of glass is decreased by the addition of _______________ during its manufacture?

   A. CaO
   B. MnO2
   C. ZnO
   D. FeS

9. Dense soda ash used in the manufacture of glass, is chemically represented by__________________?

   A. Na2CO3
   B. Na2CO3.10H2O
   C. Na2CO3.H2O
   D. Na2HCO3

10. Basic oxide is absent in ___________________ glass?

    A. Flint
    B. Pyrex
    C. Quartz
    D. All A, B. & C