Advertisements
Advertisements
प्रश्न
A brown ring is formed in the ring test for \[\ce{NO3^{-}}\] ion. It is due to the formation of ______.
पर्याय
\[\ce{[Fe(H2O)5 (NO)]^{2+}}\]
\[\ce{FeSO4.NO2}\]
\[\ce{[Fe(H2O)4(NO)2]^{2+}}\]
\[\ce{FeSO4.HNO3}\]
उत्तर
A brown ring is formed in the ring test for \[\ce{NO_{3}^{-}}\] ion. It is due to the formation of \[\ce{[Fe(H2O)5 (NO)]^{2+}}\].
Explanation:
When freshly prepared solution of \[\ce{FeSO4}\] is added in a solution containing \[\ce{NO3}\] ion, it leads to formation of a brown coloured complex. This is known as brown ring test of nitrate.
\[\ce{NO3^{-} + 3Fe^{2+} + 4H^{+} -> NO + 3Fe^{3+} + 2H2O}\]
\[\ce{[Fe(H2O)6]^{2+} + NO -> \underset{Brown ring}{[Fe(H2O)5(NO)]^{2+} + H2O}}\]
Hence, 2 moles of ammonia will produce 2 moles of NO.
APPEARS IN
संबंधित प्रश्न
Describe the laboratory method of preparation of ammonia
Mention the conditions required to maximise the yield of ammonia.
Which compound is used in the preparation of caprolactam?
Which compound is used as the cooling liquid in refrigerators?
Ammonia on reaction with hypochlorite anion can form:
When ammonia is heated with cupric oxide, a molecule of ammonia will ____________.
Ammonia is generally manufactured for fertilizers by the reaction:
Which one of the following is not a use of ammonia?
In qualitative analysis when \[\ce{H2S}\] is passed through an aqueous solution of salt acidified with dil. \[\ce{HCl}\], a black precipitate is obtained. On boiling the precipitate with dil. \[\ce{HNO3}\], it forms a solution of blue colour. Addition of excess of aqueous solution of ammonia to this solution gives ______.
\[\ce{PCl5}\] reacts with finely divided silver on heating and a white silver salt is obtained, which dissolves on adding excess aqueous \[\ce{NH3}\] solution. Write the reactions involved to explain what happens.
