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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:
\[\ce{6FeSO4 + 3H2SO4 + 2HNO3 -> 3Fe2(SO4)3 + 4H2O + 2NO}\]
\[\ce{FeSO4 + NO -> \underset{a brown compound]}{\underset{[Nitroso ferrous sulphate,}{FeSO4*NO}}}\]
संबंधित प्रश्न
Write a balanced equation and name the products formed when zinc reacts with dilute nitric acid.
The action of heat on the blue crystalline solid X gives a reddish brown gas Y, a gas which re-lights a glowing splint and leaves a black residue. When gas Z, which has a rotten egg smell, is passed through a solution of X, a black ppt. is formed.
- Identify X, Y and Z.
- Write the equation for the action of heat on X.
- Write the equation between solution X and gas Z.
Name the Following:
Salt used in the laboratory to prepare nitric acid
Name the catalyst used in Ostwald process.
What do you observe when?
Hydrogen sulphide is bubbled through conc. HNO3?
What do you observe when?
Scrap zinc is heated with conc. HNO3?
What happen when (Given balanced equation) :
Nitric acid is dissolved in large amount of water?
What happen when (Given balanced equation):
Limestone reacts with nitric acid?
Fill in the blank with appropriate word/words.
Aqua regia is a mixture of _______ and________
Give a balanced equation for the following reaction:
Copper reacts with concentrated nitric acid.
