Practice Oxidation Number in Chemistry
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
A number assigned to each atom in a compound using a set of rules, representing the hypothetical charge that atom would carry if all bonds were treated as fully ionic (all shared electrons assigned to the more electronegative atom).
An imaginary 'electron bookkeeping' system. If an atom 'owns' more electrons than usual, its oxidation number is negative; fewer means positive.
Showing a random 20 of 50 problems.
Example 1
easyWhat is the oxidation number of fluorine in any compound?
Example 2
easyOxidation number of oxygen in peroxide ?
Example 3
mediumFind the oxidation number of Cl in .
Example 4
challengeIn , identify which element is oxidized.
Example 5
mediumFind the oxidation number of I in .
Example 6
mediumAssign oxidation numbers to each atom in and determine the oxidation number of manganese.
Example 7
easyOxidation number of oxygen in ?
Example 8
mediumFind the oxidation number of V in .
Example 9
easyWhat is the oxidation number of an element in its pure form, e.g. ?
Example 10
mediumFind the oxidation number of C in .
Example 11
mediumFind the oxidation number of S in (average per S).
Example 12
easyFind the oxidation number of hydrogen in .
Example 13
mediumFind the oxidation number of C in (methanol).
Example 14
mediumFind the oxidation number of S in .
Example 15
hardFind the oxidation number of Mn in .
Example 16
mediumFind the oxidation number of Cr in .
Example 17
mediumIs oxidation number the same as ionic charge in ?
Example 18
mediumFind the oxidation number of P in .
Example 19
hardIn the reaction , determine the oxidation number of iron and carbon on each side. Which element is oxidized and which is reduced?
Example 20
easyFind the oxidation number of Al in .