Which of the following is wrong statement?
Ni(CO)4 has oxidation number +4 for Ni
Ni(CO)4 has zero oxidation number for Ni
Ni is metal
CO is gas
In [NiCl4]2-, the number of unpaired electrons, are
4
2
3
5
B.
2
In [NiCl4]2- the oxidation number of Ni is +2.
Electronic configuration of Ni (atomic no = 28)
Ni = [Ar] 3d84s2
Ni+2 = [Ar] 3d8
or [Ar]
It is evident that in [NiCl4]2- the number of unpaired electrons are two.
H2C2O4 + KMnO4 in acidic medium reacts to have change in oxidation number of Mn from
7 to 5
2 to 7
5 to 7
7 to 2
Frenkel and Schottky defects are
nucleus defects
non-crystal defects
crystal defects
nuclear defects