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प्रश्न
Give two chemical tests for nitric acid.
उत्तर
Two tests for nitric acid are-
(i) Brown ring test :
Nitric acid in a test tube is taken and then freshly prepared ferrous sulphate solution is added. Concentrated H2SO4 is then added carefully down the sides of the test tube, dark brown ring is formed at the
junction of two layers.
\[\ce{6FeSO4 + 3H2SO4 + 2HNO3 -> 3FE2(SO4)3 + 2NO + 4H2O}\]
\[\ce{FeSO4 + NO + 5H2O -> \underset{\text{Hydrated nitrosoferrous Sulphate(brown ring)}}{[Fe(NO)(H2O)5]SO4}}\]
(ii) Nitric acid on heating gives brown fumes of nitrogen dioxide.
\[\ce{4HNO3 ->[\Delta] 2H2O + \underset{\text{Brown fumes}}{4NO2} + O2}\]
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संबंधित प्रश्न
Explain the following:
Concentrated nitric add appears yellow when it is left standing in a glass bottle.
Explain the following:
An all-glass apparatus is used in the laboratory preparation of nitric acid.
How will you prepare the following from nitric acid?
Ferric nitrate
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Salt referred to as chile saltpeter.
Write balanced equation and name the product formed when :
Zinc reacts with dilute nitric acid.
Choose the correct answer from the option given below:
The catalyst used in the manufacture of HNO3 by Ostwald process is
Fill in the blank with appropriate word/words.
Ammonal is a mixture of ________ and __________
When nitric acid is prepared by the action of concentrated sulphuric acid on potassium nitrate. what is the special feature of the apparatus used?
Write the equation for the reaction:
Aluminum, Nitride and Water.
Write a balanced equation for following :
Laboratory preparation nitric acid.
