humus is formed when organic material (such as leaves , dead animals etc)is disgraded by a combination of fungi,bacteria,microbes and other animals((earthworms for example) that reside in the soil. hope this was helpful!
This will only occur if the alpha carbon to the carbonyl group can be protonated. The keto form of acetone (for example), would be a -CH2COCH3. The alpha carbon has lost a hydrogen and is negatively...