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प्रश्न
Why is freshly prepared ferrous sulphate solution used in the ring test?
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उत्तर
Freshly prepared ferrous sulphate solution is used in the ring test otherwise. Ferrous sulphate undergoes aerial oxidation and converts to ferric sulphate.
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संबंधित प्रश्न
Explain the following:
An all-glass apparatus is used in the laboratory preparation of nitric acid.
Name the products formed when carbon and conc. nitric acid is heated.
Write a balanced equation and name the products formed when cupric oxide reacts with nitric acid.
Why is the temperature maintained at 200°C in the above reaction?
Brown ring disappear if the test tube is disturbed.
Choose the correct answer from the option given below :
Concentrated nitric acid oxidises phosphorus to :
Fill in the blank with appropriate word/words.
3 Cu + 8 HNO3 (dilute) → _______ + 4H2O + _________
Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.
Name the gas evolved:
The gas produced on heating sodium nitrate.
Identify the gas evolved when sulphur is treated with concentrated nitric acid.
