Identifying Double Replacement Reactions
Which of the following equations represents a double-replacement reaction?
A
O2 + H = H2 O.
B
MgO + CO2 = MgCO3
C
CH4 + 2O2 --> CO2 + 2H2 O
D
BaCl2 + MgSO4 --> BaSO4 + MgCl2
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