Basic Concepts of ChemistryPhysical and Chemical Changes1Choose the best answerWhich of the following are chemical processes? 1. Rusting of a nail 2. Freezing of water 3. Decomposition of water into hydrogen and oxygen 4. Compression of oxygen gasA2, 3 and 4B1, 3 and 4C1 and 3D1 and 2 Like 0 Discuss 0Share