Question

Which of the following is not a noble metal?
A.Ag
B.Au
C.Cu
D.Pt

Answer 1

Hint: First see the definition of the noble metal and examples of noble metal and also which of the elements in the periodic table are noble metals and then compare your examples from the periodic table with given options.

Complete step by step answer:
Noble metal is any of the several metallic chemical elements that have outstanding resistance to oxidation, even at high temperatures.
Examples of noble metals include rhenium, ruthenium, rhodium, palladium, silver, osmium, iridium, platinum and gold.
Hence, Option C is correct.

Additional information:
We will examine some important characteristics of noble metals.
They can effectively resist corrosion and also their oxidation is least in moist air.
Noble metals are found in earth’s core.
Also another definition of noble metal is as a metal whose oxide is easily decomposed at a temperature below red heat.
They are very less attracted to oxygen.
Noble metals are widely used in organic synthesis and petro chemistry.
Also nanoparticles of noble metals can be synthesized by controlling the sintering mechanism based on the migration of metal ions.
Noble metals are also used in jewelry, coinage and as catalysts.
They also have applications in the electric field.
These metals are expensive and you can also say that the name “noble” is given to them because of their high expenses.

Note:
This is a complete theory based question. You will have to remember all the names of noble metals. In short, you can remember it as the metals of groups VIIb, VIII and Ib of the second and third transition series of periodic tables.