| Date | May 2013 | Marks available | 3 | Reference code | 13M.3.sl.TZ1.E3 |
| Level | SL | Paper | 3 | Time zone | TZ1 |
| Command term | Discuss | Question number | E3 | Adapted from | N/A |
Question
Nitrogen monoxide gas, NO, is emitted by cars and leads to acid deposition.
Discuss the damage to the environment caused by acid deposition.
Markscheme
leaches/removes nutrients from soil;
Accept specific ions for nutrients.
plant leaves are damaged;
Do not allow just damages plants.
increasing aluminium concentration in the soil;
root damage;
limestone buildings/rocks/statues react with acid;
lakes become acidic killing fish;
toxic metal ions leached/enter into water supplies;
Examiners report
Most candidates gave specific detail in their answer to the effects of acid deposition gaining partial marks, and about a third of the candidates gained full marks on part (a).
