Carbon is present in the uncombined (graphitic) form in case of__________________?
Correct answer: A. Cast iron
- A. Cast iron
- B. Steel
- C. Ferroalloy
- D. None of these
Explanation
Cast iron commonly contains excess carbon in the form of graphite flakes or nodules, whereas in steel most carbon remains chemically combined with iron as cementite or other carbides. The carbon form is therefore a key distinction between ordinary cast iron and steel.
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