Poll Results
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Assertion (A): Rusting of Iron is endothermic in nature. Reason (R): As the reaction is slow, the release of heat is barely evident.
A is true but R is false. Rusting of iron is a chemical process but not endothermic; it is a slow exothermic reaction, releasing little heat. Since the heat released is negligible, it often goes unnoticed, making the given reason incorrect.
cbse sample paper class 10 science 2025-26
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