Cambridge Secondary (7-9). Stage 7. MCE Science. Student Book - Unit 9: Chemical Reactions - Question 70

Potassium nitrate is used in fertilisers. A solution of potassium nitrate can be made by carefully dripping dilute nitric acid into potassium carbonate solution.

During the reaction, a gas is given off. If each of the three tests for gases are carried out on this gas, what would you observe?