First slide

Hydrogen

Question

Hydrogen is evolved the action of cold dilute ${HNO}_{3}$ on

Moderate

A

Fe
B

Mg or Mn
C

Cu
D

Al

Solution

Only Mg and Mn react with cold dil. ${HNO}_{3} to give H_{2}$ .
Cu reaction with dilute HNO₃ makes Copper (II) nitrate, nitric oxide
Fe reacts with dilute HNO₃ makes Ferric nitrate, nitrous oxide and water
Al reacts with HNO₃ makes Aluminium nitrate, nitrogen and water

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