JIPMER2014ChemistryEnvironmental Chemistry
In Fischer-Ringe's method of separation of nobles gas mixture from air, is used
Options
- A90 % CaC ₂+10 % CaCl ₂
- Bcoconut charcol
- Csoda lime + potash solution
- D90 % CaCO ₃+10 % urea
Correct answer
A. 90 % CaC ₂+10 % CaCl ₂
Step-by-step solution
In Fischer Ringe's method, air free from moisture and CO ₂ is passed over a heated mixture (800^ C ) of 90 % CaC ₂+10 % CaCl ₂ in an iron tube, when following reactions take place CaC ₂+ N ₂ 800^ C CaCN ₂+ C aligned & 2 C + O 2 CO & C + O ₂ CO ₂ aligned array r 2 CaC ₂+3 CO ₂ 2 CaCO ₃+5 C CuO + CO Cu + CO ₂ array CO ₂ gas is now absorbed by KOH solution. Thus a mixture of inert gases is obtained.