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

Related Mcqs:

1. ______________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant ?

   A. Pyrex B. Soda lime C. Lead D. High silica...

2. Superior quality laboratory apparatus is made of the _____________ glass having low thermal co-efficient of expansion & high chemical resistance?

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

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

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

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

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

6. DDT should not be allowed to come in contact with iron (during its manufacture) to _______________?

   A. Avoid its decomposition B. Prevent sulphonation of the monochlorobenzene by the acid catalyst C. Achieve non-hygroscopic property D. None of these...

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

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

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

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