DP Chemistry (last assessment 2024)
Question 19N.3.sl.TZ0.b(i)
| Date | November 2019 | Marks available | [Maximum mark: 2] | Reference code | 19N.3.sl.TZ0.b(i) |
| Level | sl | Paper | 3 | Time zone | TZ0 |
| Command term | Suggest | Question number | b(i) | Adapted from | N/A |
b(i).
[Maximum mark: 2]
19N.3.sl.TZ0.b(i)
Octane number is a measure of the performance of engine fuel.
Reforming reactions are used to increase the octane number of a hydrocarbon fuel.
Suggest the structural formulas of two possible products of the reforming reaction of heptane, C7H16.
[2]
Markscheme
Any two of:
NOTE: Accept skeletal formulas or full or condensed structural formulas.
Accept any other branched cycloalkane that contains 7 carbons.
Do not accept any alkenes.
Penalise missing hydrogens or bond connectivities once only in Option C.
Accept hydrogen as the second product if the first product is toluene or a cycloalkane.
