Evaporation of water
A. Both (I) and (III)
B. Both (II) and (III)
C. Both (I) and (IV)
D. Both (II) and (IV)
Answer:C
Evaporation of water
A. Both (I) and (III) B. Both (II) and (III) C. Both (I) and (IV) D. Both (II) and (IV)
Explanation: Melting of wax and evaporation of water are physical change as they undergo only change in their physical states without any change in their chemical composition. Whereas, burning of wax is a chemical change as carbon dioxide and water are formed when wax is burned. Rusting of iron is also a chemical change as iron undergoes oxidation in the presence of moisture to form rust or iron oxide.