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USES OF TRANSITION METALS (CATALYTIC CONVERTERS (Reactions (In the engine …

- - - - They use expensive metals like platinum, palladium and rhodium as the heterogeneous catalyst.
    - - Lead is a familiar catalyst poison for catalytic converters. It coats the honeycomb of expensive metals and stops it working.
- - - - Heat slows down the darkening of the lenses but speeds up the reverse reaction of becoming colourless again.
        Therefore on hot days they take a longer time to darken but on cold days, for example when skiing, they darken quickly but become transparent again slower
- - - - Transplatin, where the chlorines are opposite each other, can't interfere with DNA in the same way because the geometry is wrong.
        Cisplatin has major side-effects because, of course, it doesn't only attack the DNA in cancer cells.