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Chemistry 5070_w11_qp_11.
Q. 29 Which equation shows a reaction that would actually take place?
A 2MgO + C → CO2 + Mg
B MgO + Cu → CuO + Mg
C PbO + Zn → ZnO + Pb
D ZnO + H2 → H2O + Zn
The answer in the marking scheme is C. And i get it. But seeing that H2 can displace elements below Aluminium from their compounds , the answer D is also correct. Can anyone explain why the answer C is chosen and D is discarded?
Q. 29 Which equation shows a reaction that would actually take place?
A 2MgO + C → CO2 + Mg
B MgO + Cu → CuO + Mg
C PbO + Zn → ZnO + Pb
D ZnO + H2 → H2O + Zn
The answer in the marking scheme is C. And i get it. But seeing that H2 can displace elements below Aluminium from their compounds , the answer D is also correct. Can anyone explain why the answer C is chosen and D is discarded?