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प्रश्न
Why is oxygen collected by downward displacement of water?
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उत्तर
Since the water is displaced downward by the gas collecting in the jar, the process is called downward displacement of water. The reasons are :
- Oxygen is only slightly soluble in water. Therefore, it can be collected over water without fear of excessive dilution.
- Oxygen is slightly heavier than air, so it cannot be collected over air.
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