How many essential plant nutrients are there?
One
Two
Three
Which of these is not an essential plant nutrient?
Nitrogen
Platinum
Phosphorous
Which of the following is a natural fertiliser?
Ammonium phosphate
Potassium nitrate
Manure
Which important property is required for a fertiliser to be effective?
It must be light weight
It must be soluble
It must have a low melting point
Which of the following compounds could not be used as a fertiliser?
Potassium nitrate (\(KN{O_3}\))
Ammonium nitrate (\(N{H_4}N{O_3}\))
Sodium sulfate (\(N{a_2}S{O_4}\))
Which type of fertilisers are made by chemists?
Synthetic
Natural
Which pollution problem can be associated with fertiliser use?
Algae growth
Lower pH of water
Increased carbon dioxide levels in the atmosphere
What do the numbers on a packet of fertiliser relate to?
The mass in kg of each plant nutrient in the fertiliser
The percentage of each nutrient present in the fertiliser
How long each of the nutrients will be effective for
How can synthetic fertilisers such as ammonium nitrate be made by chemists?
Neutralisation reactions
Addition reactions
Combustion reactions
The formula of ammonium nitrate is NH 4NO3. What percentage of ammonium nitrate is nitrogen?
35%
17.5%
25%