| Date | November 2009 | Marks available | 2 | Reference code | 09N.3.sl.TZ0.B2 |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | State and explain | Question number | B2 | Adapted from | N/A |
Question
A balanced diet is needed for good health.
By comparing the structures of vitamins A, C and D given in Table 21 of the Data Booklet, state and explain which of the three vitamins is most soluble in water.
Markscheme
(vitamin) C/ascorbic acid;
more/many/several hydroxyl/OH groups that can form hydrogen bonds (with water);
M2 cannot be awarded for incorrect vitamin.
Examiners report
This was generally well done, although some candidates did not refer to hydrogen bonds when explaining the solubility of vitamin C in water.
