1. They are all metals
2. They easily form complex coordination compounds.
3. Compounds containing their ions are coloured
4. They show multiple oxidation states always differing by two units
They are all metals
1. PbCrO4
2. PbI2
3. Al2S3
4. BaCrO4
PbI2
1. AgF
2. AgCl
3. AgBr
4. Agl
Agl
1. Sn and Ag
2. Pb and Zn
3. Ag and Au
4. Fe and Ni
Ag and Au
1. PbO
2. PbO2
3. PbS
4. PbCl4
PbO
1. Clark's process
2. Mond's process
3. Parke's process
4. Haber's process
Parke's process
1. [CoCl6]4-
2. [Fe (CN)6]3-
3. [Cu(NH3)4]2+
4. Ni(CO)4
[Cu(NH3)4]2+
1. 60Nd3+,69Tm3+
2. 70Yb3+,59Pr3+
3. 63Eu2+,67Tb3+
4. 64Gd3+,67Ho3+
63Eu2+,67Tb3+
1. Cu
2. Pb
3. Ag
4. Fe
Cu
1. K4[Fe(CN)6]
2. Fe2O3
3. Fe(CO)5
4. [Fe(C2O4)3]3
Fe(CO)5