Which gas is described as Pungent/Soda?

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Multiple Choice

Which gas is described as Pungent/Soda?

Explanation:
Pungent means a sharp, irritating odor that tells you the gas is an irritant. That kind of smell is not a feature of carbon dioxide or methane, both of which are essentially odorless. Gases like nitrogen dioxide and sulfur dioxide are classic examples of pungent gases; they bite the nose and throat and are used as indicators of irritant hazards in mines. The descriptor “soda” isn’t a standard chemical property, but in practice the important point is that a pungent, irritating odor points you toward an irritant gas rather than a colorless, odorless gas. So, when you hear pungent/soda, think of NO2 or SO2 rather than CO2.

Pungent means a sharp, irritating odor that tells you the gas is an irritant. That kind of smell is not a feature of carbon dioxide or methane, both of which are essentially odorless. Gases like nitrogen dioxide and sulfur dioxide are classic examples of pungent gases; they bite the nose and throat and are used as indicators of irritant hazards in mines. The descriptor “soda” isn’t a standard chemical property, but in practice the important point is that a pungent, irritating odor points you toward an irritant gas rather than a colorless, odorless gas. So, when you hear pungent/soda, think of NO2 or SO2 rather than CO2.

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