its like an unintentional ASMR video. The doc was awesome.

Again jab bhi ma ya video dekhta hu aisa lagta hai jaisa ma kohi purna film dekh raha hunga 😂😂😂 iska background music mast hai

Thank you so much, this video helps me a lot

thanks

sir please give experiment on BOD and COD..

:) thank u sir

Sir can u explain titration method of D.O

sir please upload oil&greas method

ALL MATERIALS WATCH THE VIDEOS THANKS SIR

Sob pp bhi log comment kor

Koi bhai log

Play video in 1.75 x and thanks me later.

Watch this in 1.5X speed and thank me later