Which of the following are physical changes?( | vedclass

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(B) physical change is a change in which no new substance is formed and the chemical composition of the substance remains the same.$(i)$ Melting of ir

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$(i), (iii)$ and $(iv)$

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(B) physical change is a change in which no new substance is formed and the chemical composition of the substance remains the same.$(i)$ Melting of iron metal is a physical change because it only involves a change in the state of matter.$(ii)$ Rusting of iron is a chemical change because iron reacts with oxygen and moisture to form iron oxide,which is a new substance.$(iii)$ Bending of an iron rod is a physical change because it only involves a change in the shape of the metal.$(iv)$ Drawing a wire of iron metal is a physical change because it involves a change in the shape/form of the metal without changing its chemical identity.Therefore,$(i), (iii),$ and $(iv)$ are physical changes.

Which of the following are physical changes?
$(i)$ Melting of iron metal
$(ii)$ Rusting of iron
$(iii)$ Bending of an iron rod
$(iv)$ Drawing a wire of iron metal

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Which of the following are physical changes?$(i)$ Melting of iron metal$(ii)$ Rusting of iron$(iii)$ Bending of an iron rod$(iv)$ Drawing a wire of iron metal