JEE Physics51)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
JEE Physics52)Which one of the following oxidation states is not possible in metal carbonyls ?
2
JEE Physics53)The oxidation number of chromium in potassium dichromate is
+6
JEE Physics54)The loss of electron is termed as
oxidation
JEE Physics55)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
JEE Physics56)Which quantities are conserved in all redox reactions?
Charge only
JEE Physics57)Oxidation number of sulphur in Caro's acid is
6
JEE Physics58)Oxidation states of the metal in the minerals haematite and magnetite, respectively, are
III in haematite and II, III in magnetite
JEE Physics59)The oxidation number of C in HCN and HNC respectively are:
+ 2, + 2
JEE Physics60)Phosphorus has the oxidation state of +3 in
Phosphorous acid