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MediumChemistryEMF of cell
+4 / -1
Red hot carbon will remove oxygen from the oxides XO and YO but not from ZO. Y will remove oxygen from XO. Use this evidence to deduce the order of activity of the three metals X, Y and Z, putting the most reactive first-
A
X, Y, Z
B
Z, Y, X
C
Y, X, Z
D
Z, X, Y
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