When air which contains the gases Oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are?
nitrogen and carbondioxide
the rare gases
nitrogen and oxygen
nitrogen and the rare gases
nitrogen, carbondioxide and the rare gases
Explanation
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The quick-lime is a drying agent that can dry most gases except ammonia. Hence it removes the water vapour. Quick-lime which is calcium oxide, reacts with the carbon dioxide forming calcium carbonate. Hence carbon dioxide and monoxide is eliminated leaving nitrogen, and the rare gases.
The alkaline pyrogallon wil absorb d oxygen in d mixture while d quicklime wil absorb d carbondioxide leavin jst nitrogen nd d rare gases
Here is an explanation:
d quicklime 1st react with d water vapour to form calcium hydroxide dis z called slaking of lime, n den d slaked lime absorbs d CO2,since bases generally av affinity 4 CO2 N slaked lime is a base, d Alkaline pyragoll absorbs d oxygen
that is because alkaline pyrogallol is used to remove oxygen in air and quicklime is used to remove carbon dioxide from air.... but what about water vapour?
real explanation,,.the alkaline pyrogallol will absorb the oxygen and fused cacl2 will absorb the CO2 and water vapour,,living nitrogen and d rare gases..
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@chemvic, thanks 4 d contribution, but u are wrong about d fact wit CaO(quicklime). CaO is particularly used 4 drying Ammonia gas(NH3). Ammonia being an alkaline gas can never be dried using acids like sulphuric acid as dis tends 2 react wit it formin salt n water. So in Conclusion, CaO is most suitable 4 drying ammonia gas. Thanks!
quick lime which is cao is used for lining blast furnace and also used for drying most gas except ammoniaNH3.its used for removing oxides of carbon for a mixture.e.gco2 and co.alkaline pyrogallol/copper turning is used for removing oxygen.so the mixture left is nitrogen and the noble/rare/inert gases e.gneon,helium,argon,krypton,xenon and radon which is radioactive
Alkaline pyrogallol absorbs water and oxygen and Quicklime absorbs CO2
Therefore, Nitrogen and the rare gases will be remainig.
Ans: D
Let's break down the process:
1. *Alkaline pyrogallol* absorbs oxygen (O2).
2. *Quicklime (Calcium Oxide, CaO)* absorbs carbon dioxide (CO2) and water vapor (H2O).
Given the initial gas mixture:
1. Oxygen (O2) - absorbed by alkaline pyrogallol
2. Carbon IV oxide (CO2) - absorbed by quicklime
3. Water vapor (H2O) - absorbed by quicklime
The gases left would be:
1. *Nitrogen (N2)*
2. *Rare gases (Noble gases)*
These gases are not absorbed by alkaline pyrogallol or quicklime.
d reason is because alkaline parogallol absorbs oxygen 4rm d atmosphere, while lime water absorbes carbon iv oxides nd turns it milky.
