Question

Write balanced chemical equations for the given reactions. 3

(i) Excess SO2 gas is passed through lime water solution.

(ii)Granulated zinc metal is heated with concentrated NaOH.

(iii) Aqueous solution of sodium chloride is subjected to electrolysis with inert

electrodes.​

Answer 1

Explanation:

1.. The aqueous solution of SO2 turns blue litmus red. (ii) But when SO2 is passed through lime water, calcium sulphite (white ppt.) is formed, which reacts with excess SO2 to form calcium hydrogen sulphite .

2. When zinc granules are heated with sodium hydroxide solution, then sodium zincate salt and hydrogen gas are formed. (b) When bases react with non-metal oxides, then salt and water are formed. Example: Calcium hydroxide reacts with carbon dioxide to form calcium carbonate and water.

3. In the electrolysis of molten NaCl, Cl2 is obtained at the anode as a by product. ... If an aqueous solution of NaCl is electrolyzed, Cl2 will be obtained at the anode but at the cathode, H2 will be obtained (instead o