| Date | May 2014 | Marks available | 1 | Reference code | 14M.1.hl.TZ2.28 |
| Level | HL | Paper | 1 | Time zone | TZ2 |
| Command term | Question number | 28 | Adapted from | N/A |
Question
Which statements about an acid–base indicator are correct?
I. It can be a weak acid.
II. It is a substance in which the conjugate acid/base pair are different colours.
III. It can be a weak base.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
Markscheme
D
Examiners report
The point was made by several people that weak base indicators are beyond the scope of the specification. In fairness to the candidates it was decided to accept both answers A and D.
Syllabus sections
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