K2Cr2O7 on heating with aqueous NaOH gives
CrO42-
Cr(OH)3
Cr2O72-
Cr(OH)2
The lanthanide contraction is responsible for the fact that
Zr and Yt have about the same radius
Zr and Nb have similar oxidation state
Zr and Hf have about the same radius
Zr and Zn have the same oxidation state
Among the lanthanides the one obtained by synthetic method is
Lu
Pm
Pr
Gd
Photographic plates and films have an essential ingredient of
Silver nitrate
Silver bromide
Sodium chloride
Oleic acid
The oxidation state of Cr in K2Cr2O7 is
+5
+3
+6
+7
The transition elements have a general electronic configuration
ns2np6nd1-10
(n-1)d1-10, ns0-2, np0-6
(n-1)d1-10, ns1-2
nd1-10ns2
Oxidation state of Fe in Fe3O4 is
3/2
4/5
5/4
8/3
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
The common oxidation states of Ti are
+2,+3
+3,+4
+1,+2
+2, +3, +4
Which of the following may be considered to be an organometallic compound?
Nickel tetracarbonyl
Chlorophyll
K3[Fe(C2O4)3]
[Co(en)3]CI3
