Question

Metallic oxides of zinc, magnesium and copper were heated with the following metals.
Metal - Zinc - Magnesium - Copper
Zinc oxide
Magnesium oxide
Copper oxide

In which cases will you find displacement reactions taking place?

Answer 1

EXPLAINATION : 1. Here zinc can't react with zinc oxide so no reaction takes place but magnesium can displace zinc so displacement reaction takes place here while copper is unable to displace zinc because it is less reactive than zinc so no reaction.

2. Here zinc and copper can't displace Mg from magnesium oxide and Mg can't displace itself and hence no reaction. 3. Zn and Mg can displace Cu from copper oxide so displacement reaction takes place but Cu can't displace itself no reaction. thanks!

Answer 2

Answer:

The reactivity order of the given elements are :       Mg   >   Zn     >   Cu  

Thus following result is observed :                                

Metal Zinc Magnesium Copper

Zinc oxide No reaction Displacement No reaction

Magnesium oxide No reaction No reaction No reaction

Copper oxide Displacement Displacement No reaction