| Date | May 2011 | Marks available | 1 | Reference code | 11M.1.HL.TZ1.18 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 18 | Adapted from | N/A |
Question
Which of the following are greenhouse gases?
I. Oxides of nitrogen
II. Carbon dioxide
III. Methane
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
Markscheme
D
Examiners report
While the majority of candidates chose the correct answer D, many candidates also choose the wrong answer C. This meant they did not know that oxides of nitrogen are also greenhouse gases. This is in section 5.2.3 of the syllabus.
Syllabus sections
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