DP Chemistry (last assessment 2024)

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Question 21M.2.hl.TZ1.7a(ii)

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Date May 2021 Marks available [Maximum mark: 2] Reference code 21M.2.hl.TZ1.7a(ii)
Level hl Paper 2 Time zone TZ1
Command term Discuss Question number a(ii) Adapted from N/A
a(ii).
[Maximum mark: 2]
21M.2.hl.TZ1.7a(ii)

Oxygen exists as two allotropes, diatomic oxygen, O2, and ozone, O3.

(a(ii))

Discuss the relative length of the two O−O bonds in ozone.

[2]

Markscheme

both equal ✔

delocalization/resonance ✔


Accept bond length between 121 and 148 pm/ that of single O−O bond and double O=O bond for M1.

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