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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 ______.
Fill in the blanks using the appropriate words given below :
(Sulphur dioxide, nitrogen dioxide, Nitric oxide, Sulphuric acid)
Hot, concentrated nitric acid reacts with sulphur to form ______________.
Name the gas that is produced in the given cases :
Sulphur is oxidized by concentrated nitric acid.
What is : aqua regia
During thunderstorm, rain water contains nitric acid. Explain with reactions.
- 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.
Write a balanced equation and name the products formed when concentrated nitric acid is heated.
What is the oxidizing agent in ostwald process ?
Choose the correct word from the given options to complete the sentence :
Sulphur can be converted to sulphuric acid using __________ nitric acid.
Write equation to show the reaction between the following:
Copper and concentrated nitric acid.
