Chemistry · May / June 2017 · Paper 11 · Question 31

A farmer spread ammonium nitrate, a nitrogenous fertiliser, on a field. The next day he spread calcium hydroxide on the same field. This caused a loss of nitrogen from the ammonium nitrate. Which chemical reaction occurred?

1. AThe calcium ions reacted with the ammonium ions, producing ammonia gas.
2. BThe calcium ions reacted with the nitrate ions, producing oxides of nitrogen.
3. CThe hydroxide ions reacted with the ammonium ions, producing ammonia gas.
4. DThe hydroxide ions reacted with the nitrate ions, producing oxides of nitrogen.

As printed in the paper