DP Chemistry (last assessment 2024)

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Question 19N.3.sl.TZ0.a

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.3.sl.TZ0.a
Level sl Paper 3 Time zone TZ0
Command term Discuss Question number a Adapted from N/A
a.
[Maximum mark: 2]
19N.3.sl.TZ0.a

Metals are extracted from their ores by various means.

Discuss why different methods of reduction are needed to extract metals.

[2]

Markscheme

ions of more reactive metals are harder to reduce
OR
more reactive metals have more negative electrode potentials ✔

electrolysis is needed/used for most reactive metals
OR
carbon is used to reduce metal oxides of intermediate reactivity/less reactive than carbon
OR
heating ore is sufficient for less reactive metals ✔

NOTE: Award [1 max] for “«ease of reduction/extraction» depends on reactivity”.

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