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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.
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. Nitrogen dioxide is produced because of the thermal decomposition of a portion of nitric acid.
\[\ce{4HNO3 -> 2H2O + 4NO2 + O2}\]
उत्तर २
When exposed to sunshine, cone 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
Write a balanced equation and name the products formed when cupric oxide reacts with nitric acid.
Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.
Name the Following:
Salt used in the laboratory to prepare nitric acid
Explain with the help of a balanced equation, the brown ring test for nitric acid.
Give reason for the following:
Concentrated nitric acid is brown in colour.
What do you observe when?
Hydrogen sulphide is bubbled through conc. HNO3?
Complete and balance the following equation :
Fe + HNO3(conc.) → _____________
Complete and balance the following equation:
Cu + HNO3 → NO2 + ________+ _________
When nitric acid is prepared by the action of concentrated sulphuric acid on potassium nitrate. what is the special feature of the apparatus used?
Lead nitrate decomposes on heating to give ______.
