A) cone. \[HN{{O}_{3}}\]
B) dil. \[{{H}_{2}}S{{O}_{4}}\]
C) very dil. \[HN{{O}_{3}}\]
D) cone. \[{{H}_{2}}S{{O}_{4}}\]
Correct Answer: A
Solution :
Aluminium metal becomes passive in concentrated \[\text{HN}{{\text{O}}_{\text{3}}}\]due to the formation of an oxide layer over its surface.
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