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प्रश्न
State one relevant observation for the following:
When crystals of copper nitrate are heated in a test tube.
उत्तर
After heating, the greenish blue crystals of copper nitrate will transform into a black residue of copper oxide and release nitrogen dioxide, a reddish brown gas.
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संबंधित प्रश्न
Name the gas that is produced in the given cases :
Sulphur is oxidized by concentrated nitric acid.
Name the gas that is produced in the given case:
The action of cold and dilute nitric acid on copper
What is : aqua regia
- Write a balanced chemical equation for the laboratory preparation of nitric acid.
- In the preparation of nitric acid from \[\ce{KNO3}\], concentrated hydrochloric acid is not used in place of concentrated sulphuric acid. Explain why?
- Conc. nitric acid prepared in laboratory is yellow in colour. Why? How is this colour removed?
- Give reasons for the following:
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitrate should not be heated very strongly above 200°C.
Write the balanced equation for the following:
Action of concentrated nitric acid on copper.
How would you separate gold from a mixture of gold and copper filling?
Write the equation to show the reaction between the following:
Between copper and concentrated nitric acid.
Write equation to show the reaction between the following:
Copper oxide and dilute nitric acid.
Fill in the blank using the appropriate words given below:
Hot, concentrated nitric add reacts with sulphur to form ______.
Write a balanced equation for following :
Action of cold and dilute nitric acid on copper
