Metals and Non-metals
Metals and Non-metals
Question-1
What are amphoteric oxides? Give two examples of amphoteric oxides.
Solution:
Amphoteric oxides are the oxides, which react with both acids and bases to form salt and water. E.g. ZnO and Al2O3.
What are amphoteric oxides? Give two examples of amphoteric oxides.
Solution:
Amphoteric oxides are the oxides, which react with both acids and bases to form salt and water. E.g. ZnO and Al2O3.
Question-2
Name two metals, which will displace hydrogen from dilute acids, and two metals which will not.
Solution:
Very reactive metals like Zn and Mg displace hydrogen from dilute acids. On the other hand less reactive metals like Cu, Ag, etc. do not displace hydrogen from dilute acids.
Name two metals, which will displace hydrogen from dilute acids, and two metals which will not.
Solution:
Very reactive metals like Zn and Mg displace hydrogen from dilute acids. On the other hand less reactive metals like Cu, Ag, etc. do not displace hydrogen from dilute acids.
Question-3
In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?
Solution:
Anode is impure, thick block of metal M.
Cathode is a thin strip/wire of pure metal M.
Electrolyte is a suitable salt solution of metal M.
In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?
Solution:
Anode is impure, thick block of metal M.
Cathode is a thin strip/wire of pure metal M.
Electrolyte is a suitable salt solution of metal M.
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