| Date | November 2014 | Marks available | 4 | Reference code | 14N.3.sl.TZ0.10 |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Discuss | Question number | 10 | Adapted from | N/A |
Question
The diagrams below show a hydrogen-oxygen fuel cell with an alkaline electrolyte and a lead-acid battery (accumulator).
Discuss one advantage and one disadvantage for both fuel cells and lead-acid batteries.
Markscheme
Award [1 max] from each box – allow opposite statements:
Do not accept an advantage in one column as a disadvantage in another column.
Examiners report
Few scored all four marks in this question. Some candidates hedged their bets stating that fuel cells are expensive and lead-acid batteries are cheap. Although this is correct candidates should only use this type of comparison for either one advantage or one disadvantage.
