4. How is hydrogen collected? Why is this method
used?
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1
Answer:
Hydrogen is collected by downward displacement of water as it is less denser than water. Hence it comes out at the surface of water . It is insoluble in water so it does not dissolve in water. In case of displacement with air, it is not possible even if hydrogen is lighter than air (14.5 times lighter than air)
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0
Answer:
hydrogen is insoluble in water, so can collect it using a gas jar in a trough of water. dilute hydrochloric acid reacts vigorously with magnesium and can be dangerous.
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