Question

Which of the following is true of iron?
a.
It has the highest electrical conductivity of any metal.
b.
It can exist in many alloys, usually with a carbon base.
c.
It is highly valuable, has symbolic meaning, and widely used.
d.
It is a durable metal and is commonly used for casting.

Answer 1

Correct answers: b and d.

- b: True — iron forms many alloys; the most common are carbon-based (steel, cast iron).
- d: True — iron is durable and commonly used in casting (cast iron, ductile iron).
- a: False — silver and copper have higher electrical conductivity than iron.
- c: False — iron is widely used and symbolically important but is abundant and not highly valuable.