An iron rod is cut with a saw, and an identical rod is left out in the rain until it rusts
An iron rod is cut with a saw, and an identical rod is left out in the rain until it rusts. Karan says both changes are the same kind, since in both cases the iron's shape or colour changed. Is Karan right?
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Start thinking on Socho →More disagreements in Changes Around Us: Physical and Chemical
A candle's solid wax melts into liquid and then cools back into solidAdding a few drops of food colouring to a glass of water turns the water pinkSalt dissolves in water and disappears completelyMilk turns into curd, and curd does not turn back into milkTanya says fast changes are chemical and slow ones are physical — so iron rusting (slow) i