Advertisements
Advertisements
प्रश्न
What do you see when sodium hydroxide solution is added to zinc sulphate solution, till it is in excess?
Advertisements
उत्तर
When sodium hydroxide solution is added to zinc sulphate solution, till it is in excess whi te gelatinous precipi tates of Zn (OH)2 are formed and due to the excess of sodium hydroxide these ppt. get dissolved immidiately :
\[\ce{ZnSO4 + 2NaOH ->\underset{\text{white gelatinous ppt.}}{Zn(OH)2 + Na2SO4}}\]
\[\ce{Zn(OH)2 + 2NaOH ->\underset{\text{colourless}}{Na2ZnO2} + 2H2O}\]
APPEARS IN
संबंधित प्रश्न
Choose the most appropriate answer from the following list of oxides which fit the description.
[SO2, SiO2, Al2O3, MgO, CO, Na2O]
A basic oxide.
A compound X (having the vinegar-like smell) when treated with ethanol in the presence of the acid Z, gives a compound Y which has a fruity smell.
The reaction is:
1) Identify Y and Z.
2) Write the structural formula of X.
3) Name the above reaction.
Give a chemical test to distinguish between the given pairs of chemicals:
Lead nitrate solution and Zinc nitrate solution
Name the metal hydroxides which are:
Sparingly soluble
In caustic soda solution
Name the metal hydroxides which are :
(a) Insoluble (b) Soluble in
(i) Caustic soda solution (ii) Ammonium hydroxide solution.
What is the reaction of freshly precipitated aluminium hydroxide with caustic soda solution? Give equation.
Name a metallic hydroxide soluble in excess of NH4OH.
Name: A strong alkali
Name: Two bases which are not alkalis but dissolve in strong alkalis.
Name a compound containing zinc in the anion.
