Intext : How will you prove that H2S is acidic? 

Question

How will you prove that H₂S is acidic? 

Answer

To prove that H₂S is acidic, we can perform the following experiment:

1. Take a small amount of H2S gas in a test tube.
2. Add a few drops of blue litmus solution to the test tube.
3. If the H₂S gas is acidic, it will react with the blue litmus solution and turn it red.