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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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संबंधित प्रश्न
Taking hydrogen peroxide, how would you prepare oxygen in the laboratory ?
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Manganese dioxide acts as a _________.
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Oxygen is collected by the __________ displacement of ________.
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Oxygen is ___________ to litmus testing.
What happens when Magnesium burns in oxygen ? Also give the balanced chemical equation for the reaction.
Tick (√ ) the most appropriate answer.
When sulphur burns in oxygen, the colour of the flame is :
(a) Starting from hydrogen peroxide how is oxygen gas prepared in laboratory?
(b) What is the function of manganese dioxide?
(c) Write fully balanced equation for the liberation of oxygen from hydrogen peroxide.
(d) Why is the above method preferred to any other method?
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