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?

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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: 

Geography

question_exam: 

CDS-I

stats: 

0,9,15,12,9,1,2

keywords: 

{'wrought iron iil cast iron': [0, 0, 1, 0], 'iron': [0, 0, 1, 1], 'sequence': [0, 1, 0, 2], 'carbon content': [0, 0, 1, 0], 'order': [6, 12, 34, 35], 'terms': [0, 0, 1, 0], 'forms': [1, 0, 1, 5]}

The given question asks us to determine the sequence of iron forms in descending order of their carbon content.

Option 1: I, II, III

This option suggests that pig iron has the highest carbon content, followed by wrought iron, and then cast iron. However, this is incorrect as pig iron actually has a higher carbon content than cast iron.

Option 2: I, III, II

This option correctly states that pig iron has the highest carbon content, followed by cast iron, and then wrought iron. Pig iron is produced by smelting iron ore with a high carbon content, while cast iron is produced by melting pig iron and adding additional carbon. Wrought iron, on the other hand, has the lowest carbon content as it is produced by removing impurities, including carbon, from pig iron.

Option 3: III, II, II

This option is incorrect as it suggests that cast iron has the highest carbon content, followed by wrought iron, and then pig iron.

Option 4: III, I, II

This option is also incorrect as it states that cast iron has the highest carbon content, followed by pig iron, and then wrought iron.

Therefore, the correct answer is option 2: I, III, II, which correctly represents