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andselisk
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Air reacting with charcoal will produce $\ce{N2, CO and CO2}$.$\ce{N2},$ $\ce{CO}$ and $\ce{CO2}.$ $\ce{CO2}$ will be absorbed by calcium hydroxydehydroxide or sodium hydroxide. But

However, $\ce{CO}$ cannot be absorbed at ordinary temperatures and pressures. Only at $200°C$$\pu{200 °C}$ and $\pu{10 atm}$,$\pu{10 atm},$ it reacts with $\ce{NaOH}$ to produce sodium formate $\ce{HCOONa}$.$\ce{HCOONa}.$

Finally, $\ce{CO}$ can be oxidized into $\ce{CO2}$ by passing over hot $\ce{MnO2}$ or $\ce{Fe2O3}$,$\ce{Fe2O3},$ and then be absorbed by a hydroxide.

Air reacting with charcoal will produce $\ce{N2, CO and CO2}$.$\ce{CO2}$ will be absorbed by calcium hydroxyde or sodium hydroxide. But $\ce{CO}$ cannot be absorbed at ordinary temperatures and pressures. Only at $200°C$ and $\pu{10 atm}$, it reacts with $\ce{NaOH}$ to produce sodium formate $\ce{HCOONa}$. Finally $\ce{CO}$ can be oxidized into $\ce{CO2}$ by passing over hot $\ce{MnO2}$ or $\ce{Fe2O3}$, and then be absorbed by a hydroxide.

Air reacting with charcoal will produce $\ce{N2},$ $\ce{CO}$ and $\ce{CO2}.$ $\ce{CO2}$ will be absorbed by calcium hydroxide or sodium hydroxide.

However, $\ce{CO}$ cannot be absorbed at ordinary temperatures and pressures. Only at $\pu{200 °C}$ and $\pu{10 atm},$ it reacts with $\ce{NaOH}$ to produce sodium formate $\ce{HCOONa}.$

Finally, $\ce{CO}$ can be oxidized into $\ce{CO2}$ by passing over hot $\ce{MnO2}$ or $\ce{Fe2O3},$ and then be absorbed by a hydroxide.

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Maurice
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Air reacting with charcoal will produce $\ce{N2, CO and CO2}$.$\ce{CO2}$ will be absorbed by calcium hydroxyde or sodium hydroxide. But $\ce{CO}$ cannot be absorbed at ordinary temperatures and pressures. Only at $200°C$ and $\pu{10 atm}$, it reacts with $\ce{NaOH}$ to produce sodium formate $\ce{HCOONa}$. Finally $\ce{CO}$ can be oxidized into $\ce{CO2}$ by passing over hot $\ce{MnO2}$ or $\ce{Fe2O3}$, and then be absorbed by a hydroxide.