Question

Choose the most appropriate option from the list given below to fill in the blanks.

[NO, Nessler’s reagent, NO_2, Iron, brown ring, magnesium, Haber’s, Ostwald, Iron (II) sulphate, Hydrogen, Iron (III) sulphate]

Dilute HNO₃ reacts with copper evolving ______ gas.

Answer 1

Dilute HNO₃ reacts with copper evolving NO gas.

Explanation:

Dilute nitric acid reacts with copper to form copper nitrate, nitric oxide (NO), and water.

\[\ce{3Cu + 8HNO3 -> 3Cu(NO3)2 + 2NO + 4H2O}\]