Give one test each to distinguish between the following pairs of chemi

1.	Give one test each to distinguish between the following pairs of chemicals solutions 1. Zn(NO3)2 and Ca(NO3)2 2. NaNO3 and NaCI 3. Iron [III] chloride and copper chloride.
Answer» 1. Add NaOH solution in excess to the two solutions. The one in which white ppt. initially formed dissolves in excess of NaOH solution is Zn(NO₃)₂ solution and the other is Ca(NO₃)₂ solution. 2. Add freshly prepared ferrous sulphate solution to the two solutions. Then by the side of the test tube, pour cone, sulphuric acid (H₂SO₄) to each slowly. The one in which brown ring appears is sodium nitrate solution while the other is sodium chloride sol. 3. Add NaOH solution to both the solutions. The one which give a reddish brown ppt. is Iron(II) chloride solution and the one which gives blue ppt. is copper chloride solution.

Give one test each to distinguish between the following pairs of chemicals solutions 1. Zn(NO3)2 and Ca(NO3)2 2. NaNO3 and NaCI 3. Iron [III] chloride and copper chloride.

Answer»

1. Add NaOH solution in excess to the two solutions. The one in which white ppt. initially formed dissolves in excess of NaOH solution is Zn(NO₃)₂ solution and the other is Ca(NO₃)₂ solution.

2. Add freshly prepared ferrous sulphate solution to the two solutions. Then by the side of the test tube, pour cone, sulphuric acid (H₂SO₄) to each slowly. The one in which brown ring appears is sodium nitrate solution while the other is sodium chloride sol.

3. Add NaOH solution to both the solutions. The one which give a reddish brown ppt. is Iron(II) chloride solution and the one which gives blue ppt. is copper chloride solution.

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