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The p-Block Elements — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe p-Block Elements1 Mark
MCQ
Self protective metal among the following is:
  • A
    $Na$
  • ✓
    $Al$
  • C
    $Fe$
  • D
    $K$
✓

Answer

Correct option: B.
$Al$
$Al$ when comes in contact with air to form $\mathrm{Al}_2 \mathrm{O}_3$​ which forms a protective passive layer on the metal. This layer cannot be removed by chemical means.

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