The basic character of the transition metal monoxides follows the order
TiO > FeO > VO > CrO
TiO > VO > CrO > FeO
VO >CrO >TiO >FeO
CrO >VO >FeO>TiO
In which of the following compounds transition metal has zero oxidation state ?
[Fe(CO)5]
NH2 . NH2
NOClO4
CrO5
Lanthanides are
14 elements in the sixth period (at no = 90 to 103) that are filling 4f sub-level
14 elements in the seventh period (at no = 90 to 103) that are filling 5f sub-level
14 elements in the sixth period (at no = 58 to 71) that are filling 4 f sub-level
14 elements in the seventh period (at no = 58 to 71) that are filling 4f sub-level.
CuSO4 when reacts with KCN forms CuCN, which is insoluble in water. It is soluble in excess of KCN, due to formation of the following complex
K2[Cu(CN)4]
K3[Cu(CN)4]
Cu(CN)2
Cu[K Cu(CN)4]
Actinides
are all synthetic elements
include element 104
have any short lived isotopes
have variable valency
Which of the following metals corrodes readily in moist air ?
Gold
Silver
Nickel
Iron
Which of the following may be considered to be an organometallic compound ?
Nickel tetracarbonyl
Chlorophyll
K3[Fe(C2O4)3]
[Co(en)3]Cl3
When CuSO4 is electrolysed using platinum electrodes
copper is liberated at cathode, sulphur at anode
copper is liberated at cathode, oxygen at anode
sulphur is liberated at cathode, oxygen at anode
oxygen is liberated at cathode, copper at anode
Stainless steel contains iron and
Cr + Ni
Cr + Zn
Zn + Pb
Fe + Cr + Ni
