The maximum number of possible oxidation states of actinoides are shown by-
Neptunium (Np) and plutonium (Pu)
Nobelium (No) and lawrencium (Lr)
Berkelium (Bk) and californium (Cf)
Actinium (Ac) and throrium (Th)
The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are :
8 and 8
6 and 8
8 and 6
6 and 6
Consider the hydrated ions of Ti2+,v2+, Ti3+ and Sc3+ The correct order of their spin only magnetic moments is :
Ti3+ < Ti2+< Sc3+< V2+
Vi2+ <Ti2+< Ti3+ < Sc3+
Sc3+< Ti3+< Ti2+<V2+
Sc3+< Ti3+< V2+< Ti2+
Three complex [CoCl(NH3)5]2+ (I)[Co(NH3)5H2O]3+(II) and [Co(NH3)6]3+(III) absorb light in the visible region . the correct order of the wavelength of light absorbed by them is :
II > I > III
III > I > II
I> II> III
III> II> I
The correct order of the first ionization enthalpies is :
Ti < Mn < Ni < Zn
Mn < Ti < Zn < Ni
Ti < Mn < Zn < Ni
Zn < Ni < Mn < Ti
The highest possible oxidation states of uranium plutonium , respectively are
6 and 7
7 and 6
4 and 6
6 and 4
When copper is heated with conc. HNO3 it produces
Cu(NO3)2 and NO
Cu(NO3)2, NO and NO2
Cu(NO3)2 and N2O
Cu(NO3)2 and N2O
D.
Cu(NO3)2 and N2O
Nitric acid acts as an oxidising agent while reacting with copper.
i) when copper reacts with dilute nitric acid it forms,
3Cu + 4HNO3(dilute) --> 3Cu(NO3)2 +2NO +4H2O
ii) When copper reacts with concentrated nitric acid it forms,
Cu +4HNO3(conc.) ---> Cu(NO3)2 +NO2 +2H2O