The oxidation number of group VII elements in their binary compounds is ………….
a) -2
b) 0
c) +2
d) -1
In neutral compounds, the algebraic sum of the oxidation numbers of all the elements is
a) 0
b) -2
c) -1
d) -3
More electronegative atom has the ……….. oxidation number.
a) positive
b) negative
c) 0
d) none of these
The same element may show…… oxidation number in different compounds.
a) same
b) different
c) both a & b
d) none of these
In CO the carbon has oxidation number of …
a) +2
b) +4
c) +6
d) -2
In CO2 the carbon has oxidation number of …
a) +2
b) +4
c) +6
d) -2
