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प्रश्न
why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test?
उत्तर
Freshly prepared ferrous sulphate solution is utilised since exposure to air (e.g., keeping in a reagent bottle) causes it to oxidise to ferric sulphate solution. The \[\ce{[NO]}\] 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
Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.
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 action of heat on X.
- Write the equation between solution X and gas Z.
Explain with the help of a balanced equation, the brown ring test for nitric acid.
Why is freshly prepared ferrous sulphate solution used in the ring test?
Choose the correct answer from the option given below :
Nitric acid on standing develops brownish colour which may be attributed to the presence of :
Name (formula is not acceptable) the gas produced in the following reaction:
On warming ammonium sulphate with sodium hydroxide solution.
Why does pure nitric acid take on a yellowish brown colour when exposed to light?
Dilute nitric acid is generally considered to be a typical acid except for its reaction with metals. In what way is dilute nitric acid different from other acids when it reacts with metals?
Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.
Write the equation for the reaction:
Aluminum, Nitride and Water.
