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Question
Give a chemical test to distinguish between the following gases.
CO2 and SO2
Solution
|
Carbon dioxide |
sulphur dioxide |
| Litmus test: It turns moist blue litmus faint red. | Litmus test: It turns moist blue litmus red and finally bleaches it. This bleaching is temporary. |
| The gas has no effect on filter paper dipped in acidified K2Cr2O7 or KMnO4. | It has no effect on lead acetate paper (Distinct from H2S). This test distinguishes it from H2S. |
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