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MHT CET202520 Apr 2025Morning ShiftChemistrySolid StateActual

Identify the type of defect from following in stainless steel.

Options

  1. ASubstitutional impurity defect
  2. BInterstitial impurity defect
  3. CMetal excess defect
  4. DFrenkel defect

Correct answer

B. Interstitial impurity defect

Step-by-step solution

The composition of stainless steel as an alloy corresponds to a substitutional impurity defect , where chromium and nickel atoms replace iron atoms within the metallic crystal lattice. Metallic alloys primarily exhibit substitutional rather than interstitial incorporation of solute atoms. Metal excess and Frenkel defects are characteristic of ionic compounds, not metallic solid solutions.

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