Stainless steel is an alloy of
- AIron and copper
- BIron and zinc
- CIron and chromium
- DIron and graphite
Show answer and explanation
Correct answer: (c) Iron and chromium
Explanation
Stainless steel is an alloy of iron with chromium (at least about 10.5%, typically 18%), usually with nickel (about 8%) and a little carbon.
The chromium forms a thin, invisible layer of chromium oxide that stops rusting, so of the options, iron and chromium is correct.
Stainless steel also contains nickel; chromium is what makes it stainless.