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प्रश्न
Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test?
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उत्तर
We use freshly prepared ferrous sulphate solution because exposure to air, such as storing it in a reagent bottle, causes it to oxidise to ferric sulphate solution. The [NO] molecule will not form an additive compound with ferric sulphate; hence, the brown ring test will not be successful.
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संबंधित प्रश्न
Explain the following:
An all-glass apparatus is used in the laboratory preparation of nitric acid.
Ammonia is used in the Ostwald process.
Why is quartz used in this process?
Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.
What is meant by the following term?
Decrepitation
What is the purpose of Conc. H2SO4 in the above preparation?
- Name the process used for the manufacture of nitric acid.
- What are the reactants required for it and what are their sources?
- In which ratio reactants are taken in this process?
- Name the catalyst used in the process.
- What is the oxidizing agent in this process?
- Write the equations involved.
Complete and balance the following equation :
FeSO4 + NO + H2O → ______________
Give reason for the following:
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitatre should not be heated very strongly, above 200°C
Balanced equation of oxidation of carbon with concentrated HNO3
Explain the following:
Concentrated nitric acid appears yellow when it is left standing in a glass bottle.
