Author: Basanta Adhikari

It is fine grey powder of calcium silicate and calcium aluminate is called cement. Cement Q. How is cement manufacture in industry? Ans: Cement is manufactured by heating the mixture of lime stone (Caco3)and special type of clay (Al2 O3 .Sio2) in the ratio of 2:1 at 1600 degree centigrade. Q. Why is calcium oxide…

Carbon Dioxide Carbon dioxide is a acidic gas/ Dry ice. It is because as it reacts with water it gives carbonic acid. i.e Molecular Weight of co2 gas is c+2O= 12+ 2*16= 44amu co2 is polar covalent compound because it is formed by mutual sharing of valence electron between atom of different non-metal. Molecular structure…