Multiple Choice QuestionsAssuming complete ionisation, same moles of which of the following compounds will require the least amount of acidified KMnO4 for complete oxidation?
FeSO4
FeSO3
FeC2O4
FeC2O4
Which of the statements given below is incorrect?
Cl2O7 is an anhydride of perchloric acid
O3molecule is bent
ONF is isoelectronic with NO2
ONF is isoelectronic with NO2
Which of the following ions will exhibit colour in aqueous solutions?
La3+ (Z = 57)
Ti3+ (Z = 22)
Lu3+
Lu3+
Which of the following oxidation states is the most common among the lanthanoids
4
2
5
5
The Number of moles of KMnO4 that will be needed to react with one mole of sulphite ion in acidic solution is:
3/5
4/5
2/5
1
Identify the incorrect statement among the following:
There is a decrease in the radii of the atoms or ions as one proceeds from La to Lu.
Lanthanoid contraction is the accumulation of successive shrinkages
As a result of lanthanoid contraction, the properties of 4d series of the transition elements have no similarities with the 5d series of elements
As a result of lanthanoid contraction, the properties of 4d series of the transition elements have no similarities with the 5d series of elements
More the number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is:
more energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
the lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
the greater metallic character of the lanthanoids than that of the corresponding actinoids
the greater metallic character of the lanthanoids than that of the corresponding actinoids
It is because of inability of ns2 electrons of the valence shell to participate in bonding that
Sn2+ is reducing while Pb4+ is oxidising
Sn2+ is oxidising while Pb4+ is reducing
Sn2+ and Pb2+ are both oxidising and reducing
Sn2+ and Pb2+ are both oxidising and reducing
