Ami academics e Hazari sir pori nai,notes porsi ,basic concept clear ase,Ami udvash concept book r notes pore weekly dsi,Kintu onk question Boi theke tule dise direct. Toh amke buet written er jnno Chem hazari sir er Boi ta ektu Dagai dile Valo hoy,ami bujhtesi na this,eto km time e kivabe prbo,buet written er jnno kon kon part porata imp ogula shb dagiye guchai dile Valor hoy. Mcq ami aspect Chem pore Valoi Pari. But written e prblm. Tai buet er Kew thakle bepar ta ektu dekhben. Amke buet written standard vabe hazari sir er Boi ta guchai dile valo hoy. Demo hishebe amke Chem 1 chapter 3 er d orbital purata dekhaile valo hoy.