Classification of metals according to their chemical activity

The video explains the chemical activity of metals, classifying them into very active, less active, and inactive categories based on their reactivity with oxygen. Very active metals like sodium and potassium react quickly with air and are stored in kerosene. Less active metals such as aluminum, copper, and iron form rust over time and require protective coatings. Inactive metals like gold and silver are resistant to oxidation and are used in jewelry and protective coatings.

How does the reaction of metals with oxygen differ among very active, less active, and inactive metals?

What are the characteristics of very active metals?

List some examples of very active metals and explain their storage requirements.

Why are less active metals like aluminum and iron coated with grease?

What difficulties do inactive metals face when reacting with oxygen?