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JEE Advanced levelSingle correct optionDifficulty 3 of 3pb142

Assertion (A): Aluminium vessels can be used to transport conc. . Reason (R): Conc. forms a thin, tough, protective oxide layer on the surface of aluminium.

  1. ABoth A and R are true and R is the correct explanation of A
  2. BBoth A and R are true but R is not the correct explanation of A
  3. CA is true but R is false
  4. DA is false but R is true

Answer: A

Conc. nitric acid passivates aluminium by thickening the adherent film, which stops further attack. Hence A is true and R is its correct explanation.
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