1.
In the complex K4 [Fe (CN)6 ] the oxidation number of iron is
Answer : C. 2
2.
The oxidation number of C in oxalic acid (H2 C2 O4) is
Answer : C. 3
3.
Reduction is addition of
Answer : A. Hydrogen
4.
Oxidation number of sulphur in sulphuric acid is
Answer : C. six
5.
The oxidation number of chromium in K2 Cr2 O7 is
Answer : A. 6
6.
Oxidation is the addition of
Answer : B. Oxygen