The main reason for larger number of oxidation states exhibited by the actinides than the corresponding lanthanides, is
lesser energy difference between 5f and 6d orbitals than between 4f and 5d orbitals
larger atomic size of actinides than the lanthanides
more energy difference between 5f and 6d orbitals than between 4f and 5d orbitals
greater reactive nature of the actinide than the lanthanides
Cuprous compounds such as CuCl, CuCN and CuSCN are the only salts stable in H2O due to
high hydration energy of Cu+ ions
their inherent tendency not to disproportionate
diamagnetic nature
insolubility in water
Actinides
are all synthetic elements
include element 104
have any short lived isotopes
have variable valency
The common oxidation states of Ti are
+2, +3
+3, +4
3, -4
+2, +3, +4
The aqueous solution containing which one of the following ions will be colourless ?
Sc3+
Fe2+
Ti3+
Mn2+
More number of oxidation states are exhibited by the actinides than by the lanthanides. The main reason for this is
more energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals.
lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals.
greater metallic character of the lanthanides than that of the corresponding actinides
more active nature of the actinides
In the silver plating of copper, K[Ag(CN)2] is used instead of AgNO3. The reason is
a thin layer of Ag is formed on Cu
more voltage is required
Ag+ ions are completely removed from solution
less availability of Ag+ ions, as Cu cannot displace Ag from [Ag(CN)2]- ion
Which one of the following forms a colourless solution in aqueous medium ?
V3+
Cr3+
Bell-metal is an alloy of
Cu + Pb
Cu + Sn
Cu + Zn
Cu + Ni
