DP Chemistry (last assessment 2024)

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Question 19M.2.hl.TZ2.a(i)

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.2.hl.TZ2.a(i)
Level hl Paper 2 Time zone TZ2
Command term Outline Question number a(i) Adapted from N/A
a(i).
[Maximum mark: 1]
19M.2.hl.TZ2.a(i)

Dinitrogen monoxide, N2O, causes depletion of ozone in the stratosphere.

Outline why ozone in the stratosphere is important.

[1]

Markscheme

absorbs UV/ultraviolet light «of longer wavelength than absorbed by O2»     [✔]

Examiners report

Candidates sometimes failed to identify how ozone works in chemical terms, referring to protects/deflects, i.e., the consequence rather than the mechanism.

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