Identify the double displacement reaction out of the following.
a) CH4 + O2 → CO2 + 2 H2O
b) Pb(NO3)2 + 2 KI → PbI2 + 2 KNO3
c) CaO + H2O → Ca(OH)2
d) CuSO4 + Zn → ZnSO4 + Cu
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Answer:
option B is correct .okay.
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