Quick Review F, pg 77
1. (a) iron, nickel, copper, cadmium, tungsten.
(b) - show different oxidation numbers in their ions / compounds
- form coloured ions / compounds
- act as catalysts
2. Haber process - Iron
Ostwald process - Platinum
Contact process - Vanadium(V) oxide
3. This is due to the presence of compounds of transition elements in the stones.
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