Question

D. Give reasons for the following.
1. Aluminium oxide is amphoteric.
2. When copper turnings are put in green ferrous sulphate solution, there is no colour
change
3. Metals are reducing agents.
4. The formation of ionic compounds is a redox reaction.
5. Hydrogen is included in the metal activity series though it is a non-metal.​

Answer 1

Answer:

1. it is because aluminium has reactions with both acids and bases
2. this is because copper is less reactive than iron due to which it is not able to replace iron from the solution
3. metals act as reducing agents because they have a tendency to donate electrons and get oxidized
4. ionic bond is formed by transfer of transfer of electrons, during this process of donating and receiving both oxidisation and reduction take place simultaneously. therefore it is called a Redbox reaction.
5. this is because it helps compare the reactivities of the metals. the metals placed above hydrogen in the series can displace it from the acid.