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प्रश्न
Why is ammonium hydroxide used in qualitative analysis? Give two equations to justify your answer.
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उत्तर
Ammonium hydroxide precipitates hydroxides of metals when it is added to aqueous solution of their salts. The precipitate of metal hydroxides differ in colour and solubility and hence ammonium hydroxide is used in qualitative analysis.
(i) FeSO4 +2NH4OH → (NH4)2SO4 +Fe(OH)3
The colour of precipitate is dirty green, which is insoluble in excess of
ammonium hydroxide.
(ii) CuSO4 + 2NH4OH → (NH4)2SO4 + Cu (OH)2
The colour of precipitate is bluish white, which is soluble in excess of ammonium hydroxide.
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संबंधित प्रश्न
A gas ‘A’ reacts with another gas ‘B’ in the presence of a catalyst to give a colourless gas ‘C’. The gas ‘C’ when comes in contact with air produces a brown gas ‘D’. The solution of ‘A’ in water turns red litmus blue. Explain the observations.
Identify the substance underlined:
The catalyst used to oxidise ammonia.
Name the following
Gas obtained by treating chlorine in excess of ammonia.
Copy and complete the following equation:
\[\ce{Mg3N2 + 6H2O ->}\]
Look at the following reaction :
A. Nitrogen + metal → compound X
B. X + water → ammonia + another compound
C. Ammonia + metal oxide → metal + water + N2
(i) One metal that can be used for reaction in A is magnesium.
(a) Write the formula of the compound X, that is formed.
(b) Write the balanced equation for reaction B, where Xis the compound formed.
( c) Which property of ammonia is demonstrated by reaction C?
Write the equations for the following reactions, which result in the formation of ammonia:
(i) A mixture of ammonium chloride and slaked lime is heated.
(ii) Aluminium nitride and water.
An element has 2 electrons in its N shell. It reacts with a non-metal of atomic number 7. The compound formed reacts with warm water and produces a basic gas. Identify the elements and write a balanced chemical reaction.
The product formed when ammonia reacts with oxygen is ______.
