DP Chemistry (last assessment 2024)
Question 21M.2.sl.TZ2.e(iii)
| Date | May 2021 | Marks available | [Maximum mark: 2] | Reference code | 21M.2.sl.TZ2.e(iii) |
| Level | sl | Paper | 2 | Time zone | TZ2 |
| Command term | Deduce | Question number | e(iii) | Adapted from | N/A |
e(iii).
[Maximum mark: 2]
21M.2.sl.TZ2.e(iii)
Organic chemistry can be used to synthesize a variety of products.
Combustion analysis of an unknown organic compound indicated that it contained only carbon, hydrogen and oxygen.
Deduce the identity of the unknown compound using the previous information, the 1H NMR spectrum and section 27 of the data booklet.
SDBS, National Institute of Advanced Industrial Science and Technology (AIST).
[2]
Markscheme
Information deduced from 1H NMR:
«one signal indicates» one hydrogen environment/symmetrical structure
OR
«chemical shift of 2.2 indicates» H on C next to carbonyl ✓
Compound:
propanone/CH3COCH3 ✓
Accept “one type of hydrogen”.
Accept 
.