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प्रश्न
State one relevant observation for the following:
When crystals of copper nitrate are heated in a test tube.
State one observation:
Copper nitrate crystals are heated in a test tube.
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उत्तर
On heating, the greenish-blue copper nitrate crystals decompose to form a black copper(II) oxide residue, and reddish-brown nitrogen dioxide gas is evolved.
संबंधित प्रश्न
Cold, dilute nitric acid reacts with copper to give ______.
- Write a balanced chemical equation for the laboratory preparation of nitric acid.
- In the preparation of nitric acid from KNO3, concentrated hydrochloric acid is not used in place of concentrated sulphuric acid. Explain why?
- Conc. nitric acid prepared in the 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.
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 a balanced equation and name the products formed when sodium hydrogen carbonate is added to nitric acid.
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 the equation of the following reaction.
Sulphur can be converted to sulphuric acid using concentrated nitric acid.
Write equation to show the reaction between the following:
Copper and concentrated nitric acid.
Fill in the blank using the appropriate words given below:
Cold, dilute nitric acid reacts with copper to give ______.
Fill in the blank using the appropriate words given below:
Hot, concentrated nitric add reacts with sulphur to form ______.
