What is the correct answer?


Blue colour is imparted to glass by the addition of

A. FeSO4

B. PbO

C. CaO


Correct Answer :

C. CaO

Related Questions

Isopropyl benzene produced by alkylation of benzene with propylene is… How much temperature is maintained during quicklime manufacture in the… Fatty material used in soap making is Bakelite is chemically known as Viscosity index improver (like polystyrene or polyisobutylene) is added… Poly Tetrafluoroethylene (P.T.F.E.) is known as A unit operation is exemplified by the process of Which of the following is an additional step in the manufacture of paper… Frasch process is for Neoprene is a Dense soda ash used in the manufacture of glass, is chemically represented… Removal of dirt/soil by soaps or detergent does not involve the __________… Silicon carbide is a/an Which of the following is the second major component of cement? Liquefaction of gases cannot be done by Styrene (a monomer for the production of polystyrene) is commercially… Electric bulbs are made of __________ glass. Commercial production of soda ash by Solvay process requires limestone,… Temperature during hydrogenation of oil should not be more than 200°C,… Addition of calcium oxide to water produces The type of high refractive index glass used in optical instruments is… Nylon-6 is a Hydrogen gas is not produced commercially (for nitrogenous fertiliser… Most widely and commonly used coagulant for the removal of suspended impurities… Coloured glass is obtained by mixing of colored salts. Addition of __________… Transportation of 35% oleum during winter suffers from the problem of… One of the steps during refining of cane sugar consists of addition of… Which of the following is not a food additive? White phosphorous is stored under water, because __________ is not a constituent of gun powder.