Q. Which form of iron is least ductile?
A) Hard steel
B) Cast iron
C) Mild steel
D) Wrought steel
Explanation
(b)
Cast iron or pig iron contains 2 to 4.5% of carbon. It is least ductile and least pure form of iron. It is brittle and cannot be welded.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.