DP Chemistry (last assessment 2024)
Question 18N.3.sl.TZ0.c.i
| Date | November 2018 | Marks available | [Maximum mark: 2] | Reference code | 18N.3.sl.TZ0.c.i |
| Level | sl | Paper | 3 | Time zone | TZ0 |
| Command term | Explain | Question number | c.i | Adapted from | N/A |
c.i.
[Maximum mark: 2]
18N.3.sl.TZ0.c.i
One way of classifying materials is based on the type of bonding present.
One reaction to convert cyclohexanone to caprolactam using concentrated sulfuric acid as a catalyst is shown.
A zeolite is an alternative catalyst for this reaction.
Explain how zeolites act as selective catalysts.
[2]
Markscheme
pores/cavities/channels/holes/cage-like structures «in zeolites» have specific shape/size ✔
only reactants «with appropriate size/geometry» fit inside/go through/are activated/can react ✔
