The Haber Process & NPK Fertilizers

What are NPK fertilizers?

• Fertilizers that replace elements taken up by plants

• Fertilizers that contain nitrogen, phosphorus, and potassium compounds

• Fertilizers that improve agricultural productivity

• Fertilizers that help plants grow larger and more rapidly

How is ammonium nitrate produced?

• By reacting ammonia with nitric acid

• By treating phosphate rock with nitric acid

• By neutralizing phosphoric acid with ammonia

• By reacting ammonia with sulfuric acid

Where does the potassium in NPK fertilizers come from?

• Phosphate rock

• Ammonia

• Potassium chloride

• Nitric acid

What is the main compound of nitrogen in NPK fertilizers?

• Ammonium nitrate

• Phosphoric acid

• Ammonium phosphate

• Calcium nitrate

How is phosphate rock chemically processed for use in fertilizers?

• By treating it with nitric acid

• By treating it with sulfuric acid

• By treating it with phosphoric acid

• By treating it with ammonia

What is the difference between the production of fertilizers in industry and a school lab?

• In industry, a continuous process is used while a school lab uses a batch process

• In industry, a batch process is used while a school lab uses a continuous process

• In industry, a larger amount of fertilizers can be produced compared to a school lab

• In industry, the chemicals are produced using a water bath and a Bunsen burner

what is the catalyst used in the Haber process?

• iron

• platinum

• silver

• gold

What type of bonding is in ammonia?

• metallic

• covalent molecular

• covalent network

• ionic

Ammonia is produced by a reversible reaction. Complete the sentence. The forward reaction is exothermic, so the reverse reaction is __________________.

Which of the following is an advantage of chemical fertilisers

• Keeps the soil healthy
• Cheaper compared to the same mass of natural fertilisers
• Does not cause pollution in rivers
• Never causes a build up of chemicals in the food we eat