choose the correct answer: which is the following is a displacement reaction .
a)mgco3-----mgo+co2
b)2Na+2H2O----2NaoH+H2
c)2H2 +O2 -------2H2o
d)2pb(No3)2------2pbo+4NO2+o2
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Answer:
b.
Explanation:
sodium displace hydrogen and oxygen from water.
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