BLACK DAMP | Black damp kisse kahte hai? | Excess N2 kya hai? | Black damp kaise banti hai ?

 

Black damp kisse kahte hai?

(CO₂  + Excess nitrogen )- ke mixture ko black damp kahte hai.

 

Excess N₂ kya hai?

 General atmosphere me N₂, O₂ kaa 3.77 times rahta hai pRntu mines me bivinn prakriyao ke kaaran jaise manusya ke saans lene or chodne se F.S.L. ke jalne se , blasting se , oxidation etc se CO₂ banti hai evam  O₂ ki matra me kami hoti hai or jo O₂ bachata hai uske tulna me N₂ ke ratio me bridhi ho jati hai , isi badhe hue N₂ ko excess N₂ kahte hai.

 

*note – N₂ naa ghata hai , naa badahta  hai.

 

 Black damp kaise banti hai ?

 Hawa me O₂ or N₂ ek nischit ratio hota hai, mines me kai kriyao ke dwara kuch O₂ ke ho jati hai or CO₂ bhi banti hai. O₂ me kami, hone ke baad O₂ ke respect me N₂ ka ratio increase me ho jata hai or yahi increased excess N_2­, CO₂ ke saath milkar black damp banti hai.