DP Chemistry (last assessment 2024)
Question 18M.2.sl.TZ2.7c.ii
| Date | May 2018 | Marks available | [Maximum mark: 1] | Reference code | 18M.2.sl.TZ2.7c.ii |
| Level | sl | Paper | 2 | Time zone | TZ2 |
| Command term | Identify | Question number | c.ii | Adapted from | N/A |
c.ii.
[Maximum mark: 1]
18M.2.sl.TZ2.7c.ii
The structure of an organic molecule can help predict the type of reaction it can undergo.
Improvements in instrumentation have made identification of organic compounds routine.
The empirical formula of an unknown compound containing a phenyl group was found to be C4H4O. The molecular ion peak in its mass spectrum appears at m/z = 136.
(c.ii)
Identify the bonds causing peaks A and B in the IR spectrum of the unknown compound using section 26 of the data booklet.
[1]
Markscheme
A: C–H «in alkanes, alkenes, arenes»
AND
B: C=O «in aldehydes, ketones, carboxylic acids and esters»
[1 mark]