Question

Referring to an activity series, which of the following combinations of reactants would not produce a successful single-replacement reaction? (2 points)

Select one:
a. K + CaO
b. Al + NiO
c. Ca + Al2O3
d. Zn + BaO

Answer 1

Answer: Zn + BaO → no reaction because Zn is less reactive than Ba

Explanation: The metallic activity series lists metals according to their increasing or decreasing reactivity. A more reactive metal is able to displace a less reactive one from its compound, but not the other way around.

3 Ca + Al2O3 → 3 CaO + 2 Al

2 Al + 3 NiO → Al2O3 + 3 Ni

2 K + CaO → K2O + Ca

Zn + BaO → no reaction because Zn is less reactive than Ba