A) chromium and nickel combine with iron
B) chromium forms an oxide layer and protects iron from rusting
C) nickel present in it, does not rust
D) iron forms a hard chemical compound with chromium present in it
Correct Answer: B
Solution :Chromium is more electropositive metal than iron. In stainless steel, chromium forms an oxide layer and thus it protects steel from corrosion.
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