In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields ?
I . n = 1, l = 0, m = 0
II. n = 2, l = 0, m = 0
III. n = 2, l = 1, m = 1
IV n = 3, l = 2, m = 1
V. n = 3, l = 2, m = 0
IV & V
Which one of the following oxidation states is not possible in metal carbonyls ?
The oxidation number of chromium in potassium dichromate is
The loss of electron is termed as
State the oxidation number of carbonyl carbon in methanal and methanoic acid, respectively
1) 0 and 0
2) 0 and + 2
3) + 1 and + 2
4) + 1 and + 3
0 & +2
Which quantities are conserved in all redox reactions?
Oxidation number of sulphur in Caro's acid is
Oxidation states of the metal in the minerals haematite and magnetite, respectively, are
III in haematite and II, III in magnetite
The oxidation number of C in HCN and HNC respectively are:
+ 2, + 2
Phosphorus has the oxidation state of +3 in