Which one of the following ionic species will impart colour to an aqueous solution?
Ti4+
Cu+
Zn2+
Cr3+
Among the lanthanides the one obtained by synthetic method is
Lu
Pm
Pr
Gd
Which one of the following elements shows maximum number of different oxidation states in its compounds?
Eu
La
Am
The most durable metal plating on iron to protect against corrosion is
Nickel plating
Tin plating
Copper plating
Zinc plating
Photographic plates and films have an essential ingredient of
Silver nitrate
Silver bromide
Sodium chloride
Oleic acid
Which of the following elements is responsible for oxidation of water to O2 in biological processes?
Fe
Cu
Mn
Mo
Which of the following may be considered to be an organometallic compound?
Nickel tetracarbonyl
Chlorophyll
K3[Fe(C2O4)3]
[Co(en)3]CI3
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 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
