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प्रश्न
Explain with the help of a balanced equation, the brown ring test for nitric acid.
उत्तर
Brown ring test -
Nitric acid in a test tube is taken and then and then freshly prepared ferrous sulphate solution is added. Concentrated H2SO4 is then added carefully down the sides of the test tube, dark brown ring is formed at the junction of two layers.
\[\ce{6FeSO4 + 3H2SO4 + 2HNO3 -> 3Fe2(SO4)3 + 2NO + 4H2O}\]
\[\ce{FeSO4 + NO + 5H2O -> \underset{\text{Hydrated nitrosoferrous sulphate(brown ring)}}{[Fe(NO)(H2O)5]SO4}}\]
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संबंधित प्रश्न
Give a balanced chemical equation for Laboratory preparation of Nitric acid.
Explain the following:
Dilute nitric acid is generally considered a typical acid but not so in its reaction with metals.
Give two chemical equations for the following:
Nitric acid acting as the oxidizing agent
Name the Following:
Salt referred to as chile saltpeter.
What do you observe when?
Conc. HNO3 drops on the skin of a person?
What happens when (Given balanced equation):
Nitric acid is added to Kl (aq)?
The figure given below illustrates the apparatus used in the laboratory preparation of nitric acid:
(i) Name A (a liquid), B( a Solid) and C(a liquid).
(ii) write the balanced chemical equation to show how nitric acid undergoes decomposition.
(iii) Write the balanced chemical equation for the reaction in which copper is oxidized by concentrated nitric acid.
What is the special feature of the apparatus that is used in the laboratory preparation of nitric acid?
Why should the temperature of the reaction mixture of nitric acid not be allowed to rise above 200oC?
Identify the gas evolved when sulphur is treated with concentrated nitric acid \[\ce{NH3}\].
