state three different between a physical canng a chemical change
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Answer: Nitrogen can have oxidation numbers from −3 to +5. ... Thus, increase in oxidation number beyond +5 cannot occur. Hence, HNO3 cannot act as reducing agent
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spelling wrong of change
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A chemical change is a permanent change. A Physical change affects only physical properties i.e. shape, size, etc. ... Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
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