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23-09-2022
Chemistry

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15. Which of the following shows a physical change?
A. C₂(g) +20₂(g) → 2CO₂(g)
B. 2Cu(s) + O₂(g) → 2CuO(s)
c. 2Pb(s) → 2Pb(1)
D. K(s) + I(s) →KI(s)

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