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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
Give a balanced chemical equation for Laboratory preparation of Nitric acid.
Write a balanced equation for the action of heat on a mixture of copper and concentrated nitric acid.
What is the type of salt formed when the reactants are heated at a suitable temperature for the preparation of nitric acid?
Name the products formed when dilute HNO3 is added to copper.
Nitric acid cannot be concentrated beyond 68% by the distillation of a dilute solution of HNO3, State the reason.
Give reason for the following:
In laboratory preparation of nitric acid all the apparatus including cork should be made up of glass.
What happens when (Given balanced equation) :
Sulphar is added to hot and conc. HNO3?
Complete and balance the following equation :
FeSO4 + NO + H2O → ______________
Choose the correct answer from the option given below :
Nitric acid on standing develops brownish colour which may be attributed to the presence of :
Give one test to distinguish between the following pair of chemicals.
Zinc nitrate solution and calcium nitrate solution
