Mystery Behind The Name Of N-95 of Mask | Chhatra sir

[@ReshamMaurya-h2i]

Wow sir too amazing 😊

[@GunjitChauhan]

When chemistry meets practical life then it becomes even more interesting ❤

[@tinglingchemistry]

Mask lagane se hoti hai saanc m problem.... Pores block hojate hain moisture se jo muh se aata hai....
Btw thanks for N95 mask info

[@PruthvilHonnaiah]

Keep doing videos like this..very informative ❤

[@user277-b9n]

👑

[@Chemiophilc2151]

Awesome GKB ❤❤❤

[@gsrklawaniya8076]

Nice sir g 💯💯💯💯💯💯💯

[@mishraji7848]

Nice sir

[@chemistryclassforneetjee8180]

Wo iitian.....cm...hey....😂😂😂