Question 1
In which complexes does iron have an oxidation state of +3?
- [Fe(H2O)6]3+
- [Fe(H2O)5(CN)]2+
- [Fe(CN)6]3−
I and II only
I and III only
II and III only
I, II and III
In which complexes does iron have an oxidation state of +3?
I and II only
I and III only
II and III only
I, II and III
Which complex is likely to be colourless?
[Zn(H2O)6]Cl2
[NH4]2[Fe(H2O)6][SO4]2
K3[Co(CN)6]
[Ni(NH3)6][BF4]2
Part of the spectrochemical series is shown.
I−< Cl − < H2O < NH3
Which statement can be correctly deduced from the series?
H2O increases the p–d separation more than Cl -
H2O increases the d–d separation more than Cl -
A complex with NH3 is more likely to be blue than that with Cl -
Complexes with water are always blue
Ammonia is a stronger ligand than water. Which statement is correct when concentrated aqueous ammonia solution is added to dilute aqueous copper(II) sulfate solution?
The d-orbitals in the copper ion split.
There is a smaller splitting of the d-orbitals.
Ammonia replaces water as a ligand.
The colour of the solution fades.
Cobalt forms the complex [Co(NH3)5Cl]2+. Which statements are correct for this complex?
I and II only
I and III only
II and III only
I, II and III