In a redox reaction, why does an element’s oxidation number decrease?

Redox reactions, or oxidation-reduction reactions, have a number of similarities to acid–base reactions. like acid–base reactions, redox reactions are a matched set, that is, there cannot be an oxidation reaction without a reduction reaction happening simultaneously.

Ch4 is nonpolar and insoluble in water. since all of the hydrogen atoms are evenly spread around the carbon atom even through the c h bond is polar all the poles cancel each other out.