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प्रश्न
Explain the following:
Concentrated nitric acid appears yellow when it is left standing in a glass bottle.
Explain the following:
When it is left standing in a glass bottle, concentrated nitric acid appears yellow.
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उत्तर १
Although pure concentrated nitric acid is colourless, it appears yellow when left standing in a glass bottle due to the dissolution of reddish-brown nitrogen dioxide gas in the acid. The thermal decomposition of a portion of nitric acid produces nitrogen dioxide.
\[\ce{4HNO3 -> 2H2O + 4NO2 + O2}\]
उत्तर २
When exposed to sunshine, conc. nitric acid slowly decomposes into nitrogen dioxide gas, which is reddish brown. Nitrogen dioxide gas dissolves in nitric acid, causing it to turn yellow.
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संबंधित प्रश्न
Name the products formed when carbon and conc. nitric acid is heated.
Name the following :
Gas produced in air during lighting.
Explain with the help of a balanced equation, the brown ring test for nitric acid.
Write a balanced equation for the production of nitrogen dioxide using copper.
Name the product, catalyst and approximate temperature maintained in Ostwald's process. How is the temperature maintained in the Ostwald's process?
When nitric acid is prepared by the action of concentrated sulphuric acid on potassium nitrate. what is the special feature of the apparatus used?
Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.
Identify the gas evolved when sulphur is treated with concentrated nitric acid.
Write the equation for the reaction of dilute nitric acid with copper.
Complete the table:
| Name of Process | Inputs | Equation | Output |
| Ammonia + Air | Nitric acid |
