DP Chemistry (last assessment 2024)
Question 18M.3.sl.TZ2.b.i
| Date | May 2018 | Marks available | [Maximum mark: 3] | Reference code | 18M.3.sl.TZ2.b.i |
| Level | sl | Paper | 3 | Time zone | TZ2 |
| Command term | Label | Question number | b.i | Adapted from | N/A |
b.i.
[Maximum mark: 3]
18M.3.sl.TZ2.b.i
Organic molecules can be visualized using three-dimensional models built from kits such as that pictured below.
The above ball and stick model is a substituted pyridine molecule (made of carbon, hydrogen, nitrogen, bromine and chlorine atoms). All atoms are shown and represented according to their relative atomic size.
Label each ball in the diagram, excluding hydrogens, as a carbon, C, nitrogen, N, bromine, Br, or chlorine, Cl.
[3]
Markscheme
6 carbon atoms labelled in correct positions
both nitrogen atoms labelled in correct positions
bromine AND chlorine atoms labelled in correct positions
[3 marks]