Covalent bonding and dissociation Animation Play

Crude oil Slideshow Play

Danger – methanol! Student activity Play

Definitions Whiteboard exercise Play

Denoting the content of a problem in the form of algebraic expressions Whiteboard exercise Play

Depressant drugs Whiteboard exercise Play

Determination of the acidic properties of ethanol Animation Play

Determination of the molecular structure of an unknown compound Student activity Play

Determining the concentration of a solution using titration Student activity Play

Determining the content of oxalic acid in rhubarb Animation Play

Determining the starch content of leaves Animation Play

Determining the water content of a sample of soil Animation Play

Different physical and chemical properties of isomers Animation Play

Disease Student activity Play

Diseases Slideshow Play

Diseases caused by drinking alcohol Slideshow Play

Disinfection Animation Play

Do alcohols have acidic properties? Whiteboard exercise Play

Do alcohols have acidic properties? Student activity Play

Effects of drugs; cigarettes and alcohol on the organism Whiteboard presentation Play

Effects of drugs; cigarettes and alcohol on the organism Class activity Play

Electrolytes Student activity Play

Electrolytic dissociation (2) Student activity Play

Elimination reactions in halogenated hydrocarbons (1) Student activity Play

Environmental factors in neoplasm formation Student activity Play