1.

The figure given below illustrates the apparatus used in the laboratory preparation of nitric acid.(a) Name A (a liquid), B (a solid) and C (a liquid). ( Do not give the formulae)(b) Write an equation to show how nitric acid undergoes decomposition(c) Write the equation for the reaction in which copper is oxidized by concentrated nitric acid

Answer»

(a) A = Conc. Sulphuric acid

B = potassium nitrate

C = nitric acid

(b) Nitric acid undergoes decomposition as follows:

4HNO3 + heat → 4NO2 +2H2O +O2

(c) Copper is oxidized by concentrated nitric acid:

Cu + 4HNO3 Cu(NO3)2 + 2H2O +2NO2



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