Answer the following questions in d etail. Q1. Differentiate between reversible and irreversible changes.
Q2. Differentiate between physical and chemical changes.
Q3. List four changes that are both physical and reversible.
Q4. List four practical applications of expansion and contraction.
Q5. Write a short note on expansion in gases.
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Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula.
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answer any question if you know the answer for the queations.
dont type unnessary words
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