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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 products formed when carbon and conc. nitric acid is heated.
Ammonia is used in the Ostwald process.
What is the ratio of ammonia and air taken in this process?
Write the equations involved in Ostwald process.
Give three equations of the reaction to prove that nitric acid is an acid.
Give reason for the following:
Nitric acid is used in purification of gold.
What happens when (Given balanced equation):
Nitric acid is added to Kl (aq)?
Give reason for the following:
Commercial concentrated nitric acid is yellow in colour, but when it is dilute with water, it turns colourless.
Give one chemical test for nitric acid.
Give the name of a soluble lead salt and write the eqution for the action of heat on this salt. Write the equation for the preparation of nitric acid from potassium nitrate.
The first step in the manufacture of nitric acid is the catalytic oxidation of ammonia. What is the name of the catalyst?
Give one test to distinguish between the following pair of chemicals.
Zinc nitrate solution and calcium nitrate solution
