Nitrogen cycle Slideshow Play

Nitrogen fertilisers Student activity Play

Nitrogen fertilisers Slideshow Play

Nitrogenous excretion Student activity Play

Nitrogenous waste products Slideshow Play

Non-aqueous acid–base reactions Student activity Play

Nucleophiles as Lewis bases Animation Play

Nucleophilic substitution reactions in haloalkanes Student activity Play

Number of moles of ammonia molecules Animation Play

Nutrient deficiency Student activity Play

Octahedral ammine-metal complexes Animation Play

Odour Animation Play

Organic compounds in the cosmos Slideshow Play

Origin of crude oil (1) Student activity Play

Origin of fossil fuels Student activity Play

Other ways to accelerate chemical reactions Student activity Play

Oxidation and reduction reactions Student activity Play

Oxidation states of nitrogen Animation Play

Oxidation states of the p-block elements in their commonest chemical compounds Student activity Play

Oxidation states of cobalt, nickel and zinc Animation Play

Oxidative deamination Slideshow Play

Oxidising agents used in organic chemistry Animation Play

Pale plants Animation Play

Partial pressure and molar fraction Student activity Play

Partial pressure and molar fraction Whiteboard exercise Play