Question

4. An element reacts with oxygen to form a compound which is basic in re Themes
likely to be (i) Calcium (ii) Carbon (ii) Hydrogen (ov) Mitropen. Explain with rear
5. Noble metals are used to make jewellery. Give reason
6. Explain how painting a metal prevents it from corrosion.​

Answer 1

Answer:

Explanation:

5.Noble metals are metals which don't react with anything

as it doesn't react with anything it will last longer than other metals

so it is used in making jewellery

6. painting a metal helps in preventing corrosion because it acts like a protective layer around metal by preventing it from reacting with other elements