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प्रश्न
Explain with the help of a balanced equation, the brown ring test for nitric acid.
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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
Ammonia is used in the Ostwald process.
Name the oxidising agent used in this process.
Give two chemical equations for the following:
Nitric acid acting as the oxidizing agent.
Write a balanced equation and name the products formed when cupric oxide reacts with nitric acid.
Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test?
Name the process used for the manufacture of nitric acid.
State the conditions for the oxidation of ammonia to nitrogen monoxide [nitric oxide], in the manufacture of nitric acid by Ostwald's process. Write the balanced equcation for the reaction.
Write a chemical equation to illustrate the acidic nature of nitric acid.
What is the special feature of the apparatus that is used in the 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.
Explain why only all-glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.
