Short Answer TypeWhat happens when:
(i) sodium carbonate reacts with the milk of lime.
(ii) sodium carbonate is added to water.
(iii) sodium carbonate reacts with a dilute mineral acid?
Long Answer TypeHow is sodium hydroxide manufactured? Discuss in brief the details of the process.
Or
With the help of a diagram, show the reactions at the cathode and anode in the manufacture of sodium hydroxide by the Castner - Kellner process.
Short Answer TypeName a few important uses of sodium hydroxide.
Sodium hydroxide is used:
(i) in the manufacture of metallic sodium, artificial silk and dyes.
(ii) in the refining of petroleum and as a reagent in the laboratory.
(iii) in soap, textile and paper industries.
(iv) in the preparation of soda lime (NaOH + CaO).
(v) for preparing bleaching agents like sodium hypochlorite and for the purification of bauxite.
Explain what happens when:
(i) Sodium hydrogen carbonate is heated
(ii) Sodium amalgam reacts with water
(iii) Fused sodium metal reacts with ammonia?
Explain the significance of sodium, potassium, calcium and magnesium in biological fluids ?
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