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प्रश्न
Why is ammonium hydroxide used in qualitative analysis? Give two equations to justify your answer.
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
State one relevant observation for given reactions:
Burning of ammonia in air.
The equation 4NH3 + 5O2 → 4NO + 6 H2O, represents the catalytic oxidation of ammonia. If 100 cm3 of ammonia is used calculate the volume of oxygen required to oxidize the ammonia completely
Complete the following equation.
4 NH3 +5O2 →
What important process starts with the reaction in above? Name the catalyst used.
Name the gas evolved in each of the following cases :
Ethene undergoes hydrogenation reaction.
Name the following
Products obtained by burning ammonia in oxygen.
Ammonia is manufactured by Haber Process.
Under what conditions do the reactants combine to form ammonia? Give a balanced equation for the reaction.
Ammonia is manufactured by Haber Process.
In what ratio by volume, are the above reactants used.
Describe all what you will observe and write chemical equation, when limited amount of ammonia gas is passed through the following aqueous solution:
FeCl3
Write the equation for the following :
Ammonium chloride is treated with sodium hydroxide.
A compound which undergoes thermal dissociation.
