Question

It was not until 18th century when they did comprehensive work on properties of gases their exchange and respiration. Who were they here

Answer 1

Answer:

It was not until 18th century when Lavoisier and Priestley did a comprehensive work on properties of gases, their exchange and respiration that we came to know something about how the process of gaseous exchange goes on, in our body.

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Answer 2

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It was not until 18th century when Lavoisier and Priestley did a comprehensive work on properties of gases, their exchange and respiration that we came to know something about how the process of gaseous exchange goes on, in our body.

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• Lavoisier also carried out several experiments to understand the property of gases
• it is clear that Lavoisier thought that the gas liberated on heating powdered charcoal in a belljar kept over water in a trough was like fixed air
• In those days carbon dioxide was known as fixed air.
• The next series of experiments dealt with the combustion of phosphorus in a belljar.
• Lavoisier showed that whatever in the atmospheric air which combined with the phosphorus, was not water vapor
• Final statement that the substance which combines with thephosphorus is “either air itself, or another elastic fluid present, in a certain proportion, in the air which we breathe”
• This was the respirable air, a component of air that also helped in burning

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