Posted by Anon on Sunday, December 2, 2012 at 1:06am.
Here is a site that will show you how to assign oxidation numbers to each element. Do that with each equation. Redox equations will have some that change oxidation state; non-redox will not.
For example, the first one is a redox equation. Zn changes from zero on the left to +2 on the right. Cu changes from +2 on the left to zero on the right.
http://www.chemteam.info/Redox/Redox-Rules.html
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