Manufacture of Sulfuric Acid and Oleum by Contact Process , Sulfuric Acid,Oleum,

[@sushildubey9859]

Excellent. Thanks

[@govindmaurya1482]

Gjb Bhaiya Ji

[@ashishmaurya11thb17]

I am really impressed with your teaching method 😊

[@mrsaiyambro]

Bhaiya ji❤❤❤❤

[@PurvarajsinhRana]

It is called DCDA process

[@Abhishekkumar-zw7mn]

🔥🔥🔥

[@DurgeshSingh-ln6hl]

🙏🙏👍👍

[@ronakkarena7135]

Thank you sir

[@babluaadilabubakr]

Hii