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प्रश्न
Why does pure nitric acid take on a yellowish brown colour when exposed to light?
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उत्तर
Yellowish brown colour of nitric acid is due to the presence of nitrogen dioxide formed due to thermal decomposition of nitric acid.
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संबंधित प्रश्न
Write a balanced chemical equation for the following:
Action of cold and dilute Nitric acid on Copper
Ammonia is used in the Ostwald process.
Why is quartz used in this process?
How will you prepare the following from nitric acid?
Aqua regia
Why is freshly prepared ferrous sulphate solution used in the ring test?
Give reason for the following:
Aluminum does not react with nitric acid of any concentration.
What happens when (Given balanced equation) :
Sulphar is added to hot and conc. HNO3?
Describe what you see when concentrated nitric acid is added to copper.
The figure given below illustrates the apparatus used in the laboratory preparation of nitric acid:
(i) Name A (a liquid), B( a Solid) and C(a liquid).
(ii) write the balanced chemical equation to show how nitric acid undergoes decomposition.
(iii) Write the balanced chemical equation for the reaction in which copper is oxidized by concentrated nitric acid.
Copy and complete the following table relating to important industrial processes output refers to the product of the process not the intermediate steps.
| Name of process | Inputs | Catalyst | Equation for catalysed reaction | Output |
| Haber process | Hydrogen + | |||
|
Ammonia + |
Nitric acid |
What would you observe in the following case:
Copper is heated with concentrated nitric acid in a hard glass test tube.
