| Date | November 2016 | Marks available | 1 | Reference code | 16N.1.hl.TZ0.9 |
| Level | HL | Paper | 1 | Time zone | TZ0 |
| Command term | Deduce | Question number | 9 | Adapted from | N/A |
Question
The oxidation state of cobalt in the complex ion [Co(NH3)5Br]x is +3. Which of the following statements are correct?
I. The overall charge, x, of the complex ion is 2+.
II. The complex ion is octahedral.
III. The cobalt(III) ion has a half-filled d-subshell.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
Markscheme
A
Examiners report
[N/A]
Syllabus sections
Additional higher level (AHL) » Topic 13: The periodic table—the transition metals » 13.2 Coloured complexes
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