Which glass is usually used in optical work ?

Related Mcqs:

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

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

2. ___________________ glass is used for the manufacture of optical glass ?

   A. Pyrex
   B. Soda
   C. Flint
   D. Crooke’s

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

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

4. 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

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. Blue colour is imparted to glass by the addition of__________________?

   A. FeSO4
   B. PbO
   C. CaO
   D. NaOH

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. Which of the following processes is absent in glass manufacturing process ?

   A. Sintering
   B. Annealing
   C. Shaping or forming
   D. Melting

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

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