Which one is binary acid
H2SO4
HF
HNO3
None of these
Example for cation
Ammonium
Acetate
Sulphate
Fluoride
Variable valency of gold is
1,2
1,3
2,3
3,5
Which is the variable valency of Iron
2,4
Which is a balanced chemical equation?
Pb (NO3)2 → PbO + 2NO2 + O2
K2Cr2O7+HCI → KCl + CrCl3 + H2O +Cl2O2
2KNO3 → 2KNO2 +O2
H2O + Cl2 → HCl + O2
Whose method about symbol system is considered as the basic of modern system of chemical symbols and formulae?
Dalton
Avogadro
Johann Berzelius
Al chemists
Molecular mass of carbon dioxide is
16
32
44
28
Formula of cupric oxide
Cu2O
CuO
FeO
Fe2O3
Example for monovalent electro positive
Barium
Aluminium
Zinc
Empirical formula of Hydrogen peroxide .
CH
C6H6
H2O2
OH
