What happen when (1) an increase stick is burnt (2) water is heated in pan

When an incense stick is burnt new substances like Ashes and smoke is released the incense stick cannot be produced from Residue again. Hence it is a chemical change because it goes through Tu a chemical reaction and is also all Irreversible change incense stick is used to freshen up the room with the help of fragrance.

When we boil the water in Pan it starts boiling these water vapour escape out into the atmosphere from the pan this process is called evaporation due to evaporation quantity of water in the pan begins to decrease.

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