A white amphoteric oxide reacts with sodium hydroxide to give sodium zincate and water. Name this amphoteric oxide.
What is the colour of sodium sulphate formed due to the reaction of zinc sulphate with sodium hydroxide?
When zinc react with hot and concentrated NaOH, a colourless salt is formed. Name this colourless salt.
Sodium meta aluminate
To which of the following salts, sodium hydroxide when added gives a precipitate?
All of the above
A metal salt (M) on reacting with sodium hydroxide forms sodium sulphate and a gelatinous white precipitate of a metal hydroxide. The precipitate is soluble in excess of sodium hydroxide. Identify M.
Name the products formed when a small amount of KOH solution is added to the ZnSO4 solution.
Sodium zincate and water
Zinc hydroxide and sodium sulphate
Sodium zincate and sodium suphate
Zinc hydroxide and water
The reaction of zinc with hot concentrated caustic alkalis involve the liberation of
hydrogen chloride gas.
carbon dioxide gas.
Ammonium hydroxide solution can be used to distinguish between zinc ion and calcium ion.
The products formed when an excess of NaOH solution is added to ZnSO4 solution are ____ and ____.
sodium zincate, water
Sodium oxide, zinc
Sodium sulphate, zinc oxide
ZnSO4 (aq) + 2NaOH(aq)→
ZnSO4(aq) + 2NH4OH(aq) → (NH4)2SO4(aq) +
- Na2SO4 (aq)
- Zn(OH)2 (ppt.)