Which one is binary acid
H2SO4
HF
HNO3
None of these
Variable valency of gold is
1,2
1,3
2,3
3,5
Whose method about symbol system is considered as the basic of modern system of chemical symbols and formulae?
Dalton
Avogadro
Johann Berzelius
Al chemists
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
Which is the variable valency of Iron
2,4
Valency of Mg in Magnesium chloride
2+
5
2-
3+
Empirical formula of Hydrogen peroxide .
CH
C6H6
H2O2
OH
H2O represents _______?
One molecule of water
Two molecule of Hydrogen and one molecule of oxygen
Two molecule of water
What is the chemical symbol of calcium?
Ca
Cu
C
Kr
Example for anion ?
Barium
Aluminum
Arsenic
Carbonate
