A. CaO
B. MnO2
C. ZnO
D. FeS
Related Mcqs:
- ______________ 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 - 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 - 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 - ___________________ glass is used for the manufacture of optical glass ?
A. Pyrex
B. Soda
C. Flint
D. Crooke’s - Commonly used glass is known as the _______________ glass?
A. Flint
B. Hard
C. Pyrex
D. Soda - 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 - Laboratory glass wares which reacts with hydrofluoric acid, are made of the ______________ glass?
A. Lead
B. Borosilicate
C. Soda lime
D. Alkali silicate - Type of glass used in optical work is the ___________________ glass?
A. Soda-lime
B. Fibre
C. Lead
D. Borosilicate - The type of high refractive index glass used in optical instruments is _____________ glass?
A. Pyrex
B. Flint
C. Crookes
D. None of these - Blue colour is imparted to glass by the addition of__________________?
A. FeSO4
B. PbO
C. CaO
D. NaOH
