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Railways PYQCBT 1 2016

RRB NTPC · Question 90

Stainless steel is A. A compound B. A mixture C. An element D. An alloy

  1. D

  2. B

  3. C

  4. A

Show answer & explanation

Answer: (A) D

Explanation

Stainless steel is an alloy, a metallic mixture of iron with at least about 10.5% chromium (and often nickel). The chromium forms a thin oxide layer that protects it from rusting.