O-LevelChemistryMetals & Reactivity5070/21 · Oct/Nov 2022 · Q15 Marks
The diagram shows part of the Periodic Table. |||III|IV|V|VI|VII|VIII ---|---|---|---|---|---|---| || Na|| K|Ca|Cr|Fe|Ni|Zn| Sr|||Ag| Ba|| Answer the following questions using only the symbols of the elements in the diagram. Each symbol may be used once, more than once or not at all. Give the symbol of the element that:
- (a)is a catalyst in the hydrogenation of alkenes[1]
- (b)is extracted by electrolysis of its oxide dissolved in cryolite[1]
- (c)is a metal below copper in the reactivity series[1]
- (d)is a gas used in welding[1]
- (e)forms an ion with a charge of –1.[1]
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Mark scheme
Marking points from the official mark scheme (Oct/Nov 2022). The mark or mark type is shown in brackets.
- Ni
- Al
- Ag
- O
- Cl
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