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प्रश्न
Write the observation for the following:
NaOH is added drop-wise till in excess to a solution of zinc sulphate.
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उत्तर
When NaOH is added drop-wise to a solution of zinc sulphate, then the following reaction takes place:
\[\ce{ZnSO4 + 2NaOH -> \underset{\text{White gelatinous ppt.}}{Zn(OH)2 v + Na2SO4}}\]
When NaOH becomes in excess, then the following reaction takes place:
\[\ce{Zn(OH)2 + 2NaOH -> \underset{\text{Colourless}}{Na2ZnO2} + 2H2O}\]
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संबंधित प्रश्न
Choose the correct answer from the options given below:
A chloride which forms a precipitate that is soluble in excess of ammonium hydroxide is:
1) Calcium chloride
2) Ferrous chloride
3) Ferric chloride
4) Copper chloride
What happens when ammonia solution is added first dropwise and then in excess to the following solution:
CuSO4
Write a balanced equation for this reaction.
Name the metal hydroxides which are soluble in ammonium hydroxide solution.
You are provided with PbCO3, ZnCO3 and CaCO3. How will you identify these cations?
Three test tubes contain calcium nitrate solution, zinc nitrate solution and lead nitrate solution.Describe the effect of Adding ammonium hydroxide to each portion in turn till it is in excess.
Choose the correct answer from the options given below :
A chloride which forms a precipitate that is soluble in excess of ammonium hydroxide is :
Write balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
Identify the cation in the following case:
Ammonium hydroxide solution when added to Solution B gives a white precipitate which does not dissolve in excess of ammonium hydroxide solution.
Rita was given an unknown salt for identification. She prepared a solution of the salt and divided it into two parts.
- To the first part of the salt solution, she added a few drops of ammonium hydroxide and obtained a reddish-brown precipitate.
- To the second part of the salt solution, she added a few drops of silver nitrate solution and obtained a white precipitate.
Name:
- The cation present and
- The anion present in the salt given for identification.
Write balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
