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1) Identify which reaction is NOT a chemical reaction.

A) H2O (g) → H2O (l)
B) 2H2O (l) → 2H2 (g) + O2 (g)
C) AgNO3 (aq) + Cu (s) → Ag (s) + CuNO3 (aq)
D) Pb(NO3)2 (aq) + 2 NaI (aq) → PbI2 (s) +2 NaNO3 (aq)

Answer :

Answer:

a) is the answer as water directly changes its state

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