The outer electronic configuration of Cu atom is _____________
3d10 4s1
3d9 4s1
3d5 4s2
3d6 4s1
The aqueous solution containing which one of the following ions will be colourless?
(At no: sc = 21, Fe = 26, Ti = 22, Mn = 25)
Sc3+
Fe2+
Ti3+
Mn2+
Stainless steel contains iron and
Cr + Ni
Cr + Zn
Zn + pb
Fe + Cr + Ni
When (NH4)2Cr2O7 is heated, the gas evolved is
N2
NO2
O2
N2O
Ions with _________ configuration are colourless in nature.
d1
d3
d5
d10
The basic character of the transition metal monoxides follows the order
(At no Ti = 22, V = 23, Cr = 24, Fe = 26)
TiO > FeO > VO > CrO
TiO > VO > CrO > FeO
VO > CrO > TiO > FeO
CrO > VO > FeO > TiO
The imperfect shielding of one electron by another in the same set of orbitals is one of the factor responsible for __________
Lanthanoid contraction
electron affinity
electronegativity
ionisation energy
General electronic configuraiton of lanthanides are
(n - 2) f1-14(n-1)s2p6d0 to 1,ns2
(n - 2) f10-14(n -1)d0-1ns2
(n - 2) f0-14(n -1)d0-1ns2
(n - 2) f0-1(n -1)f14
d- block elements are also known as ________ elements.
transition
inner transition
alkali
alkaline earth
Which one of the following ions is the most stable in aqueous solution?
(At no Ti = 22, V = 23, Cr = 24, Mn = 25)
Cr3+
V3+
Mn3+
