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प्रश्न
Explain the following:
Concentrated nitric add appears yellow when it is left standing in a glass bottle.
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उत्तर
Although pure concentrated nitric acid is colorless, 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.
4HNO3 → 2H2O + 4NO2 + O2
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संबंधित प्रश्न
Name the gas evolved when the following mixtures are heated.
Sodium Nitrite and Ammonium Chloride
Write a balanced equation for the action of heat on a mixture of copper and concentrated nitric acid.
Ammonia is used in the Ostwald process.
Give the sources of reactants used in this process.
How will you prepare the following from nitric acid?
copper nitrate
Name a metal nitrate which on heating is changed into metal.
Write the equations involved in Ostwald process.
Give reason for the following:
In laboratory preparation of nitric acid all the apparatus including cork should be made up of glass.
Complete and balance the following equation :
Fe + HNO3(conc.) → _____________
Why does pure nitric acid take on a yellowish brown colour when exposed to light?
What is the property of nitric acid which allows it to react with copper?
