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During the practical in the lab when hyd...

During the practical in the lab when hydrogen sulphide gas having offensive odour is prepared for some test, we can smell the gas even 50 metres away. Explain phenomenon.

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### Step-by-Step Solution 1. **Understanding the Scenario**: In the lab, hydrogen sulfide (H₂S) gas is being prepared. This gas is known for its strong and offensive odor. 2. **Observation**: The gas can be detected by smell even from a distance of 50 meters away. This indicates that the gas is spreading through the air. 3. **Identifying the Phenomenon**: The ability to smell the gas from a distance is due to a process called **diffusion**. ...
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