Question

What are the uses of noble metals?

Answer 1

Hint: Noble metals are inert metals which resist oxidation and corrosion. Acids cannot quickly attack these noble metals. They are opposed to base metals that are highly active in oxidation and corrosion. Note that not all metals with corrosion resistance are noble and inert metals.

Complete answer:
Noble metals are used in jewellery, electrical appliances, making protective coatings and as catalysts for different reactions. Some of the noble metals are ruthenium, rhodium, palladium, silver, gold, iridium and rhenium.
Uses of silver: It is a shiny and heavy metal. It is the best conductor of electricity. It is used in making silver ornaments and also expensive utensils like glasses, mugs, etc. It is used in making coins. It is also used to make mirrors using a process known as sputtering. Salts of silver chloride are used to make photographic films.
Uses of gold: It is a bright yellow metal which is highly malleable and ductile. The countries having more gold reserves are considered to be wealthy. It is used to make ornaments and high-value coins and medals. It is used to cover the mainframe of artificial satellites.
Uses of platinum: It is a silvery white metal which is highly malleable and ductile. . It is used to make ornaments and also watches. It is used as a catalyst in the manufacturing of nitric acid and sulphuric acid.

Note:
Noble metals like silver and platinum are used in medicines. They are excellent conductors and are also used to make contacts and electrodes. The noble metal silver has antibacterial actions. The noble metal platinum is used as a catalyst.