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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:
Dilute nitric acid is generally considered a typical acid but not so in its reaction with metals.
Name the products formed when carbon and conc. nitric acid is heated.
Write an equation for the following conversions A, B, C and D.
How will you prepare the following from nitric acid?
Sodium nitrate
How is nitric acid prepared in a laboratory?
Give reason for the following:
Conc. Nitric acid renders iron passive.
Give reason for the following:
Concentrated nitric acid is a stronger oxidizing agent.
Choose the correct answer from the option given below:
The catalyst used in the manufacture of HNO3 by Ostwald process is
Give the name of a soluble lead salt and write the equation for the action of heat on this salt.
Copy and complete the following table relating to important industrial processes output refers to the product of the process not the intermediate steps.
| Name of process | Inputs | Catalyst | Equation for catalysed reaction | Output |
| Haber process | Hydrogen + | |||
|
Ammonia + |
Nitric acid |
