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

Related Mcqs:

1. The product obtained on mixing calcium oxide with water is called __________________?

   A. Quicklime
   B. Slaked lime
   C. Milk of lime
   D. None of these

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

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

3. Basic oxide is absent in ___________________ glass?

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

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

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

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

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

6. Addition of calcium oxide to water produces___________________?

   A. Exothermic heat
   B. Hissing sound
   C. Slaked lime
   D. All A , B. & C .

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

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

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

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

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

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

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

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