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...