DP Chemistry (last assessment 2024)

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Question 21N.2.hl.TZ0.a

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Date November 2021 Marks available [Maximum mark: 1] Reference code 21N.2.hl.TZ0.a
Level hl Paper 2 Time zone TZ0
Command term Outline Question number a Adapted from N/A
a.
[Maximum mark: 1]
21N.2.hl.TZ0.a

Biochemical oxygen demand (BOD) can be determined by the Winkler Method.

Outline what is measured by BOD.

[1]

Markscheme

«amount of» oxygen used to decompose the organic matter in water ✔

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