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प्रश्न
Name the oxide of nitrogen which turns brown on exposure to air. How is it prepared?
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उत्तर
Oxide is NO (Nitric oxide).
This turns brown (NO2).
Preparation:
(i) Nitrogen and oxygen combine in the atmosphere during lightning discharge.
\[\ce{N2 + O2 <=> 2NO}\]
(ii) By oxidation of ammonia.
\[\ce{4NH3 + 5O2 ->[Pt][800^\circ C]4NO + 6H2O + Heat}\]
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संबंधित प्रश्न
Give a balanced chemical equation for Laboratory preparation of Nitric acid.
The nitrate salt which does not give a mixture of NO2 and O2 on heating is ______.
Name the catalyst used in Ostwald process.
Give three equations of the reaction to prove that nitric acid is an acid.
Complete and balance the following equation :
C + HNO3 → ___________
Give the name of a soluble lead salt and write the eqution for the action of heat on this salt. Write the equation for the preparation of nitric acid from potassium nitrate.
Why does pure nitric acid take on a yellowish brown colour when exposed to light?
When nitric acid is prepared by the action of concentrated sulphuric acid on potassium nitrate. what is the special feature of the apparatus used?
Explain the following:
Concentrated nitric acid appears yellow when it is left standing in a glass bottle.
Explain why nitric acid is kept in a reagent bottle for a long time.
