…………….is commonly called silica.
a) zinc oxide
b) silicon oxide
c) magnesium oxide
d) calcium oxide
The chemical formula of silica is …………
a) SO2
b) Si
c) SO3
d) SiO2
Steam reacts with sulphur producing ………..
a) hydrogen sulphide
b) sulphur dioxide
c) both a & b
d) none of these
Water reacts will metallic oxide forming……
a) acids
b) bases
c) both a & b
d) none of these
Calcium oxide is called……………
a) silica
b) quick lime
c) slaked lime
d) all of these
Calcium hydroxide is called …………
a) quick lime
b) slaked lime
c) both a & b
d) none of these
