Question

E. Give a chemical test - to distinguish between the following pairs of compounds
using the test given within the bracket.
[4]
1) Ammonium chloride and sodium chloride. (using an alkali]
2)Calcium nitrate and potassium nitrate. (using a flame test]
3)Sodium sulphite and sodium sulphate. (using barium chloride]
(iv) Potassium carbonate and potassium sulphide. [using a dilute acid]​

Answer 1

(i) Addition of excess of Ammonium hydroxide.

(i) Addition of excess of Ammonium hydroxide.Lead nitrate results in insoluble white precipitate while zinc nitrate initially forms white precipitate that solublises in excess of ammonium hydroxide solution.

(i) Addition of excess of Ammonium hydroxide.Lead nitrate results in insoluble white precipitate while zinc nitrate initially forms white precipitate that solublises in excess of ammonium hydroxide solution.(ii) Silver nitrate test. Silver nitrate gives white precipitate with sodium chloride while sodium nitrate do not react.

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