Question

State one relavant observation for each of the following. 1.Heating concentrated nitric acid.
2.Treating platinum with dil. nitric acid​

Answer 1

Answer:

Solution 1

(a) Aqua fortis: Nitric acid is called aqua fortis. Aqua fortis means strong water. It is so called because it reacts with nearly all metals.

(b) Aqua Regia: Conc. Nitric acid (1part by volume) when mixed with conc. Hydrochloric acid (3 parts by volume) gives a mixture called aqua regia. It means Royal water.

HNO3 +3HCl NOCl +2H2O +2[Cl]

(c) Fixation of Nitrogen: The conversion of free atmospheric nitrogen into useful nitrogenous compounds in the soil is