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If you r talking about gases

Downward delivery:-collecting gases which are denser than air. e.g. carbon dioxide, chlorine.

upward delivery :-collecting gases which are less dense than air. e.g. hydrogen.

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βˆ™ 14y ago
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βˆ™ 6mo ago

Upward delivery refers to communication or information flowing from lower- to higher-level individuals within an organization. Downward delivery is the opposite, flowing from higher- to lower-level individuals. Both types are crucial for effective communication and decision-making within a hierarchical structure.

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βˆ™ 14y ago

some gases are denser than (heavier) air e.g. CO2, HCl, H2S, Cl2. are delivered by downward delivery. while gases which are Less dense than (lighter) air e.g. H2,NH3 are delivered by upward delivery.

simultaneously the downward delivery of gas = upward displacement of air while upward delivery of gas = downward displacement of air.

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Q: What is the difference between upward and downward delivery?
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Related questions

Is argon an upward delivery gas?

No. Argon is slightly denser than air so would not be collected by upward delivery. In practice downward delivery would be unreliable as the difference in density is so small. However there is no way to prepare argon in the lab so the question is redundant.


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