Which of the following molecular formula denotes sodium carbonate?
CH3COOH
Na2CO3
K2CO3
Na2SiO3
Valency of Mg in Magnesium chloride
2+
5
2-
3+
Barium is _______ type of electro positive
Monovalent electro positive
Divalent electro positive
Trivalent electro positive
Tetravalent electro positive
Example for basic radical is
Magnesium
Bromide
Chloride
Silicate
H2O represents _______?
One molecule of water
Two molecule of Hydrogen and one molecule of oxygen
Two molecule of water
None of these
What is the chemical symbol of calcium?
Ca
Cu
C
Kr
Variable valency of gold is
1,2
1,3
2,3
3,5
Formula of cupric oxide
Cu2O
CuO
FeO
Fe2O3
Which of the following elements represented symbol "Ag"?
Gold,
Silver
Iron
Antimony
Whose method about symbol system is considered as the basic of modern system of chemical symbols and formulae?
Dalton
Avogadro
Johann Berzelius
Al chemists
