EAMCET Engineering 2005 Solved Paper

In Fischer Ringe's method, air free from moisture and CO2 is passed over a heated mixture (800∘C) of 90% CaC2+10%CaCl2 in an iron tube, when following reactions take place
CaC2+N2

800∘C

→

CaCN2+C
2C+O→2‌CO
C+O2→CO2
2CaC2+3CO2→2CaCO3+5C
CuO+CO→Cu+CO2
CO2 gas is now absorbed by KOH solution.
Thus a mixture of inert gases is obtained