This video lecture from Group VA and Group VIA Elements (F.Sc. second year Chemistry) covers the physical and chemical properties of di-nitrogen oxide commonly known as nitrous oxide or nitro. The application of this colorless gas as the ‘laughing gas’ is discussed. Chemical reactions with sulfur and phosphorus where nitro supports combustion and oxidative nature with copper is covered in detail. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.