Limestone is predominantly
A.magnesium carbonate
B.sodium carbonate
C.calcium carbonate
D.potassium carbonate
A.magnesium carbonate
B.sodium carbonate
C.calcium carbonate
D.potassium carbonate
A.CaO(s) + 3C(s) ?CaC2 + CO(g)
B.CaCO3(s) ? CaO(s) + CO2(g)
C.CaC2(s) + H2O(I) ? Ca(OH)2 + C2H2(g)
D.C(s) + CO2(g) ?2CO(g)
A.Ca(OH)2
B.CaCO3
C.CaO
D.NaOH
A.monoclinic suphur
B.rhombic sulphur
C.milk of sulphur
D.plastic sulphur
A.sulphuric acid is formed in solution
B.phosphorous
C.arsenic
D.coke
A.ethyl magnesium chloride
B.ethyl chloride
C.sodium sulphate
D.sodium cabonate
A.their atomic weight
B.their molecular weight
C.their equivalent weight
D.the square of their equivalent weight
A.limestone and slaked lime
B.limestone and quick lime
C.limestone and bauxite
D.limestone and sand
A.is prepared by distilling 20% oleum
B.is prespared by chamber process
C.does not contain free SO3
D.contains 0.65% free SO3
A.Flint glass
B.Crown glass
C.Quartz glass
D.Pyrex glass