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प्रश्न
What do you see when sodium hydroxide solution is added to zinc sulphate solution, till it is in excess?
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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 :
\[\ce{ZnSO4 + 2NaOH ->\underset{\text{white gelatinous ppt.}}{Zn(OH)2 + Na2SO4}}\]
\[\ce{Zn(OH)2 + 2NaOH ->\underset{\text{colourless}}{Na2ZnO2} + 2H2O}\]
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संबंधित प्रश्न
State one relevant observation for the following.
Lead nitrate solution is treated with sodium hydroxide solution dropwise till it is excess.
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.
Name the metal hydroxides which are soluble in caustic soda solution.
What is the reaction of freshly precipitated aluminium hydroxide with caustic soda solution? Give equation.
Name: A strong alkali
Name : A yellow monoxide that dissolves in hot and concentrated caustic alkali.
Fill in the blank.
To distinguish soluble salts of zinc and lead ______ [NaOH / NH4OH]can be used.
Choose the correct answer from the options given below :
Metal + alkali → salt + _________
Write balanced equations for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
