Question

Constantan is an industrial alloy consisting of $60$% copper and $40$% nickel. It is an example of a:

• A. catalyst
• B. solid solution
• C. solid-solid reaction
• D. chemical reaction

Answer 1

The correct option is B solid solution

• Constantan is a copper–nickel alloy also known as Eureka, Advance, and Ferry. It usually consists of 60% copper and 40% nickel. Its main feature is its resistivity, which is constant over a wide range of temperatures.
  
• A uniform mixture of substances in solid form. Solid solutions often consist of two or more types of atoms or molecules that share a crystal lattice, as in certain metal alloys.
  
• Constantan is an example of solid solution.