Advertisements
Advertisements
प्रश्न
Why is oxygen collected by downward displacement of water?
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.
APPEARS IN
संबंधित प्रश्न
Fill in the blank :
Oxygen occupies about _____% of air by volume.
The natural way of adding oxygen to air which involves green plants is called
Fill in the blank:
Oxygen occupies about ______ of air by volume.
Why is potassium chlorate is not used for laboratory preparation of oxygen ?
What happens when Magnesium burns in oxygen ? Also give the balanced chemical equation for the reaction.
Give balanced equation to obtain oxygen from Silver oxide.
Complete and balance the following equation
\[\ce{N2 + O2 ->[3000°C]}\]
Statement given below is incorrect. Write the correct statement :
Calcium burns in oxygen with a golden-yellow flame.
Write fully balanced equation for the following :
SO2 + H2O →
Give reasons for the following:
patients suffering from lung problems are kept in an oxygen tent.
