If you get a puncture on the road it's far easier to change the tube and repair the punctured one later at home. To repair the tube you'll need a pump, tyre levers and a puncture repair kit with patches, sandpaper, a marker and glue. 2. Stand the bike upside down.
Chemical reaction. A process in which one or more substances (reactants) are chemically changed into one or more new substances (products). Chemical changes may involve motion of electrons in the forming and breaking of chemical bonds.
chemical reaction - (chemistry) a process in which one or more substances are changed into others; there was a chemical reaction of the lime with the ground water.ddition reaction-a chemical reaction in which one molecule is added to another. aldol reaction-a reaction of aldehydes resulting in an aldol. chain reaction-a series of chemical reactions in which the product of one is a reactant in the next.