If air is exhaled into lime water.What will happened?Name the metabolic activity involved.?

As the others have said. The CO2 from the exhaled air will be precipitated out as CaCO3.

Lime and more often other similar chemicals are used in air purification systems where the air needs to be recycled such as re-breathing diving devices, submarines, space craft etc. What actually happens is that as the air is exhaled it is passed through the lime (or similar) to remove (scrub) the CO2. The amount of O2 used is replaced and then the air distributed for breathing.
If air is exhaled in lime water,the lime water will turn milky.This is so because the carbon dioxide will react with the calcium hydroxide to from calcium carbonate.this is in soluble in water hence the milky colour.The activity that takes place in lime water is not metabolic,it is simple inorganic chemical reaction.But if you mean the exhalation of CO2 from lungs then it is called as purification of blood in lungs.You can learn more about it on wikipedia by searching in respiration and purification of blood.
Milk white precipitates of Calcium carbonate will be formed.
Our exhaled air contains carbon di oxide and lime water contains calcium hydroxide. On reaction of both we will get calcium carbonate.
the lime water turns milky.
the lime water will turn milky as the calcium hydroxide in lime water reacts with the carbon dioxide of our breath to produce calcium carbonate,which remains insoluble and floats as a sediment, turning lime water milky.the metabolic activity involved is respiration
When air is exhaled in clear lime water,the water turns milky. This in fact is one of the tests to detect carbon dioxide gas.The carbon dioxide in our exhaled air reacts with the calcium hydroxide in the lime water to produce calcium carbonate which is milky in colour.The air when inhaled contains approximately 20% oxygen.This oxygen enters the blood stream through the capillary in the lungs and is used by the cells for metabolism, the by product of metabolic activity such as carbon dioxide and moisture is discharged by the cells into the blood .These are expelled through exhaling.
If air is exhaled into lime water, the lime water turns milky. This is due to the fact that the precipitates of CaCo3 are formed. Thus the activity involved is precipitation.
Well, l think the above answers could also be right.
lime water will turn into milky white
This metabolic activity is respiration!
lime h2o will turn milky carboxylation
The lime water turns milky when air is exhaled into it.It is a inorganic reaction not a metabolic activity.And this happens because the carbon dioxide exhaled in lime water have a reaction with calcium hydroxide which results with the lime water & turns it milky &forms calcium carbonate
it turns milky. CO2+lime=?
When you inhale, your lungs 'Oxygenate' the blood.
The blood travels from the heart via the arteries and capillaries to the cells of the body that use the oxygen for energy by reaction with carbon based substances. (A form of combustion).
This produces carbon dioxide that leaves the cells via the venous capillaries and veins back via the lungs. In the lungs, the CO2 leaves the blood and, as you exhale, the CO2 leaves the body..then the next intake of breath repeats the whole cycle again.
Blow your breath into lime water and it turns milky due to the formation of Calcium Carbonate.

(I didn't really have much idea on this 'Metabolic Activity' stuff, but, it makes sense as I have blood, a heart, lungs, arteries, capillaries and veins and all the other working parts and, I exist, therefore, I am. !).

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