DP Chemistry (last assessment 2024)

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Question 17N.3.sl.TZ0.13b

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.3.sl.TZ0.13b
Level sl Paper 3 Time zone TZ0
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 1]
17N.3.sl.TZ0.13b

Much of our energy needs are still provided by the refined products of crude oil.

(b)

Many like to refer to our “carbon footprint”. Outline one difficulty in quantifying such a concept.

[1]

Markscheme

which specific carbon-based greenhouse gases are included

OR

whether non-carbon based greenhouse gases should be included

OR

whether CO/incomplete combustion should be included «as can be oxidized to CO2»

OR

how to “sum” all steps in a process creating CO2

OR

difficult to determine both direct and indirect production of GHG/greenhouse gas emissions

Ignore reference to geopolitical issues (eg false recording of data by governments etc.).

Accept “difficult to measure all sources of CO2” but not “difficult to measure CO2 released in atmosphere”.

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