Steel is an alloy of iron and
ASulphur (about 10%)
BTin (about 30%)
CMercury (about 5%)
DCarbon (0.1 to 1.5%)
Answer & Solution
Correct answer: D. Carbon (0.1 to 1.5%)
1. The chapter section on alloys lists steel composition.
2. Steel is iron with about 0.1 to 1.5% carbon.
3. Other elements like Cr, Ni may be added for stainless steel.
4. So option A is correct.
_Source: Selina Concise Chemistry Class 10, Ch 7 Metallurgy (Mistral OCR'd PDF), section on alloys_
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