Question

Classify the following in to physical a chemical change burning of candle freezing of water mixing of iron filling and sand fading of clothes

Answer 1

burning of candle - chemical change
freezing of water - physical change
mixing of iron filling - physical

Answer 2

1-Burning of candle is both a physical and a chemical change because when wax melts it changes its form from solid to semi-solid i.e. a physical change,and when the wax burns,it becomes a chemical change.    2-Freezing of water is a physical change because it can easily be reversed.     3-Mixing of iron filling and sand is a chemical change because it cannot be reversed. 4-fading of clothes is also a chemical change because it cannot be reversed,,,,,,,,and yeah remember,i'm not sure about the 3rd one