2h2o2 → 2h2o + o2 synthesis decomposition combustion

Decomposition

Explanation:

The equation 2 H₂O₂ → 2 H₂O + O₂ is an example of a decomposition reaction. During decomposition, a compound breaks down into two or more       products under the favorable conditions, without combining with other reagents.

However, the reaction can be catalyzed using a suitable catalyst.  

clouds form

solid ice forms on leaves.

water droplets form on grass.