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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe p-Block Elements2 Marks
Question
Give reasons:
Conc. $\mathrm{HNO}^3$ can be transported in aluminium container.
✓

Answer

Al reacts with cone. $\mathrm{HNO}_3$ to form a very thin film of aluminium oxide on its surface which protects it from further reaction.
$2 \mathrm{Al}(\mathrm{~s})+6 \mathrm{HNO}_3 \text { (conc.) } \rightarrow \mathrm{Al}_2 \mathrm{O}_3(\mathrm{~s})+6 \mathrm{NO}_2(\mathrm{~g})+3 \mathrm{H}_2 \mathrm{O}(\mathrm{l})$

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