Fertilisers & Ammonium Salts – Foundation Quiz

1. Many fertilisers contain the ion with formula NH₄⁺. What is this ion called?

a) Nitrate ion
b) Ammonium ion
c) Hydrogen ion
d) Hydroxide ion

2. Which pair of reactants is used to make the fertiliser ammonium nitrate?

a) Ammonium hydroxide and nitric acid
b) Ammonium hydroxide and sulfuric acid
c) Ammonium hydroxide and water
d) Ammonia and oxygen

3. What type of reaction happens when an acid reacts with an alkali such as ammonium hydroxide?

a) Combustion
b) Neutralisation
c) Oxidation
d) Decomposition

4. Ammonia can neutralise acids. This means ammonia is acting as a .

5. Complete the word equation for making ammonium nitrate:

ammonium hydroxide + nitric acid → ammonium + water

6. Which ion is present in all acids?

a) OH^-
b) H⁺
c) NH₄⁺
d) Cl^-

7. Which pair of substances will make ammonium sulfate fertiliser?

a) Ammonium hydroxide and hydrochloric acid
b) Ammonium hydroxide and sulfuric acid
c) Ammonium hydroxide and phosphoric acid
d) Ammonium hydroxide and water

8. The ion with formula NH₄⁺ is called the ion.

9. Sulfuric acid (H₂SO₄) has two hydrogen atoms in its formula. How many moles of ammonium hydroxide are needed to fully neutralise 1 mole of sulfuric acid?

a) 1 mole
b) 2 moles
c) 3 moles
d) 4 moles

10. Why are fertilisers added to soil?

a) To make the soil heavier
b) To add essential elements like nitrogen so plants grow better
c) To cool the soil
d) To remove water from the soil