DP Chemistry (last assessment 2024)

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Question 19N.3.hl.TZ0.a(ii)

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

Superconductors have no resistance below a critical temperature.

Suggest why the resistance of metals increases with temperature.

[2]

Markscheme

increased vibrations of «lattice» ions ✔
increased «probability of» collisions «between electrons and cations» ✔

NOTE: Accept “increases lattice vibrations” for M1.

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