Q: 97 (CDS-I/2003)

Consider the following forms of iron: I. Pig iron II. Wrought iron IIL Cast iron What is the sequence of these in terms of descending order of their carbon content?
question_subject: 
Science
question_year: 
2003
question_exam: 
CDS-I
stats: 
0,264,320,136,264,144,40