Which of the following methods is suitable for preventing an iron frying pan from rusting ?
Applying a coating of zinc
Applying grease
Applying paint
all of the above.
Why do ionic compounds have high melting points ?
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 ?
Which of the following pairs will give displacement reactions ?
Name two metals which will displace hydrogen from dilute acids, and two metals which will not.
What type of oxides are formed when non-metals combine with oxygen?