Advertisements
Advertisements
प्रश्न
Explain why nitric acid is kept in a reagent bottle for a long time.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test?
Name the Following:
Salt referred to as chile saltpeter.
Write balanced equation and name the product formed when :
Cupric oxide reacts with nitric acid.
Fill in the blank with appropriate word/words.
3 Cu + 8 HNO3 (dilute) → _______ + 4H2O + _________
Name the product, catalyst and approximate temperature maintained in Ostwald's process. How is the temperature maintained in the Ostwald's process?
Write the equation to show the reaction between the following:
Dilute nitric acid to produce carbon dioxide.
What is the special feature of the apparatus that is used in the laboratory preparation of nitric acid?
What would you observe in the following case:
Copper is heated with concentrated nitric acid in a hard glass test tube.
What happens when
NH3 solution is added to CuSO4 solution drop by drop and then in excess.
Give a balanced equation for the following reaction:
Copper reacts with concentrated nitric acid.
