Which transition element of the following outermost electronic configuration shows the highest oxidation state?
3d3, 4s2
3d5, 4s1
3d5, 4s2
3d6, 4s2
C.
3d5, 4s2
Maximum oxidation states shown by a transition element = (n-1)d unpaired electrons +ns electrons.
Therefore, the maximum oxidation state is for electronic configuration 3d6, 4s2, i.e. +7.
Which of the following properties increases on going down from F to I in group VII-A of the periodic table?
Electronegativity
Volatile nature
Ionic radius
Oxidising power
Point out in which of the following properties oxygen differs from the rest of the members of its family (Group-VIA)?
High value of ionisation energies
Oxidation states (2,4,6)
Polymorphism
Formation of hydrides
In which of the following solvents, AgBr will have the highest solubility?
10-3 M NaBr
10-3 M NH4OH
Pure water
10-3 M HBr
Which of the following radicals will not be precipitated by passing H2S in concentrated acid solution?
Copper
Antimony
Arsenic
Cadmium
Which element from group V gives most basic compound with hydrogen?
Nitrogen
Bismuth
Arsenic
Phosphorus
Transitional elements are mostly
diamagnetic
paramagnetic
neither diamagnaetic nor paramagnetic
diamagentic and paramagnetic both