Chemistry
Grade-8
Easy
Question
Dry Hydrogen is collected by downward displacement as it is:
- Soluble in water and heavier than air
- Soluble in water and lighter than air
- Insoluble in water and lighter than air
- Insoluble in water and heavier than air
Hint:
Displacement of water in the downwards direction is called downward water displacement. It is used to collect gases that are insoluble in water and have a low density compared to water.
The correct answer is: Insoluble in water and lighter than air
The correct option is c)Insoluble in water and lighter than air
This is because hydrogen readily oxidizes in the presence of air. In other words, hydrogen is easily mixed with air and cannot be recovered by this method. So from above we can see that although hydrogen is lighter than air, it is collected by the downward movement of water, not air.
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