Which of the following are chemical changes?( | vedclass

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(C) chemical change is a process where one or more substances are altered into one or more new and different substances.$(i)$ Decaying of wood: This i

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$(i)$ and $(ii)$

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(C) chemical change is a process where one or more substances are altered into one or more new and different substances.$(i)$ Decaying of wood: This is a chemical change because microorganisms break down the wood into new substances.$(ii)$ Burning of wood: This is a chemical change because wood reacts with oxygen to form carbon dioxide,water vapor,and ash,which are new substances.$(iii)$ Sawing of wood: This is a physical change because only the shape and size of the wood change,not its chemical composition.$(iv)$ Hammering of a nail into a piece of wood: This is a physical change as it involves a mechanical action without altering the chemical identity of the wood or the nail.Therefore,$(i)$ and $(ii)$ are chemical changes.

Which of the following are chemical changes?
$(i)$ Decaying of wood
$(ii)$ Burning of wood
$(iii)$ Sawing of wood
$(iv)$ Hammering of a nail into a piece of wood

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Which of the following are chemical changes?$(i)$ Decaying of wood$(ii)$ Burning of wood$(iii)$ Sawing of wood$(iv)$ Hammering of a nail into a piece of wood