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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
Procedure:
- Add freshly prepared saturated solution of iron (II) sulphate to the aq. solution of nitric acid.
- Now add conc. sulphuric acid carefully from the sides of the test tube so that it does not fall dropwise in the test tube.
- Cool the test tube in water.
- A brown ring appears at the junction of the two liquids.
Reaction:
\[\ce{6FeSO4 + 3H2SO4 + 2HNO3 -> 3Fe2(SO4)3 + 4H2O + 2NO}\]
\[\ce{FeSO4 + NO -> \underset{a brown compound]}{\underset{[Nitroso ferrous sulphate,}{FeSO4*NO}}}\]
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संबंधित प्रश्न
How will you prepare the following from nitric acid?
copper nitrate
Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.
Give reason for the following:
In laboratory preparation of nitric acid all the apparatus including cork should be made up of glass.
Write balanced equation and name the product formed when :
Concentrated nitric acid is heated.
What do you observe when?
Scrap zinc is heated with conc. HNO3?
What happen when (Given balanced equation):
Limestone reacts with nitric acid?
Choose the correct answer from the option given below:
The catalyst used in the manufacture of HNO3 by Ostwald process is
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 would you observe in the following case:
Copper is heated with concentrated nitric acid in a hard glass test tube.
Complete the table:
| Name of Process | Inputs | Equation | Output |
| Ammonia + Air | Nitric acid |
