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प्रश्न
Explain why nitric acid is kept in a reagent bottle for a long time.
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उत्तर
Pure nitric acid is unstable to heat or sunlight. In the presence of sunlight, it decomposes even at room temperature.
\[\ce{4HNO3 ->[Heat][Sunlight]4NO2 + 2H2O + O2}\]
This decomposition produces nitrogen dioxide (NO2), a reddish-brown gas, which dissolves in nitric acid and turns it yellow over time. To prevent decomposition, nitric acid is stored in dark-coloured reagent bottles, which reduce its exposure to light and help maintain its purity for a long time.
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संबंधित प्रश्न
How will you prepare the following from nitric acid?
copper nitrate
Name the Following:
Product obtained by heating concentrated nitric acid.
Give three equations of the reaction to prove that nitric acid is an acid.
Give reason for the following:
Commercial nitric acid is yellow in colour, but when it is diluted with water, it turns colourless.
Give reason for the following:
Aluminum does not react with nitric acid of any concentration.
Write balanced equation and name the product formed when :
Cupric oxide reacts with nitric acid.
What do you observe when?
Concentrated nitric acid is dropped on a hot surface?
Complete and balance the following equation:
Cu + HNO3 → NO2 + ________+ _________
The first step in the manufacture of nitric acid is the catalytic oxidation of ammonia. What is the name of the catalyst?
Give a balanced equation for the following reaction:
Copper reacts with concentrated nitric acid.
