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प्रश्न
What do you observe when caustic soda solution is added to the following solution, first a little and then in excess:
ZnSO4
Write a balanced equation for this reaction.
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उत्तर
\[\ce{\underset{\text{Colourless}}{ZnSO4} + 2NaOH -> \underset{\text{white gelatinous ppt.}}{Zn(OH)2↓} + \underset{\text{Colourless}}{Na2SO4}}\]
In excess of alkali , White gelatinous ppt. of Zn(OH)2 becomes soluble :
\[\ce{Zn(OH)2 + 2NaOH(excess) -> \underset{\text{Sodium Zincate (Colourless)}}{Na2ZnO2 + 2H2O}}\]
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संबंधित प्रश्न
Identify the substance underlined, in the following case:
Cation that does not form a precipitate with ammonium hydroxide but forms one with sodium hydroxide.
What do you observe when caustic soda solution is added to the following solution, first a little and then in excess:
FeCl3
Write a balanced equation for this reaction.
Name the chloride of a metal which is soluble in excess of ammonium hydroxide. Write equation for the same.
Sodium hydroxide solution is added to solution A. A white precipitate is formed which is soluble in excess sodium hydroxide. Name the metal ion present in A.
State what do you observe when:
Neutral litmus solution is added to alkaline solution
Choose the correct answer from the options given below :
Hydroxide of this metal is soluble is sodium hydroxide solution
A white solid A when heated with sodium hydroxide solution, gives a pungent gas B, which turns red litmus blue. The solid, when dissolved in dilute nitric acid and treated with silver nitrate gives a white precipitate of C which is soluble in an ammonia solution.
Distinguish by adding:
Sodium hydroxide solution and ammonium hydroxide solution to lead nitrate solution and zinc nitrate solution.
Distinguish by adding:
Sodium hydroxide solution and ammonium hydroxide solution to Fe(II) salt solution and Fe(III) salt solution.
State one relevant observation for the following:
To the copper nitrate solution, initially, few drops of sodium hydroxide solution is added and then added in excess.
