Chemical Reactions and Equations

Food cooked (correct)

Milk left at room temperature during summers

An iron tawa/pan/nail left exposed to humid atmosphere

Food digested in our body

Physical changes only involve a change in appearance, while chemical changes involve a change in composition (correct)

Physical changes involve a change in the composition of the substance, while chemical changes do not

Physical changes are reversible, while chemical changes are irreversible

Physical changes occur only at high temperatures, while chemical changes occur at any temperature

Chemical change (correct)

Depends on the temperature

No change

Physical change

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