The outer electronic configurations of Zn, Cd and Hg are represented by the general formula _______
(n-1)d10ns2
(n-1)d1-10ns1-2
(n-1)d5ns1
(n-1)d5ns2
Which of the following may be considered to be an organometallic compound?
Nickel tetracarbonyl
Chlorophyll
K3[Fe(C2O4)3]
[Co(en)3]CI3
Ions with _________ configuration are colourless in nature.
d1
d3
d5
d10
Which one of the following is an ore of silver?
Argentite
Stibnite
Haematite
Bauxite
Actinides
are all synthetic elements
Include element 104
have any short lived isotopes
have variable valency
Ti4+ ions are found to be __________
black
colourless
green
violet
The common oxidation states of Ti are
+2,+3
+3,+4
3,-4
+2, +3, +4
Of the following transition metals, the maximum number of oxidation states are exhibited by
chromium (Z = 24)
manganese (Z = 25)
iron (Z = 26)
titanium (Z = 22)
The outer electronic configuration of Cr atom is _________
3d4 4s2
3d5 4s1
3d6 4s0
3d3 4s3
Photographic plates and films have an essential ingredient of
Silver nitrate
Silver bromide
Sodium chloride
Oleic acid
