fertilisers

What are the three essential elements that plants require?

• nitrogen phosphate potassium

• nitrogen sulphur potassium

• nitrogen potassium phosphorous

• nitrogen potassium polonium

Which of the following would be a suitable fertiliser?

• nitrogen dioxide

• potassium nitrate

• copper phosphate

• nitrogen oxide

ammonia is a very acidic gas

• true

• false

What type of bonding is in ammonia?

• metallic

• covalent molecular

• covalent network

• ionic

ammonia reacts with acids to produce ammonium salts

• true

• false

what is the catalyst used in the Haber process?

• iron

• platinum

• silver

• gold

During the Haber Process, ammonia that is produced is separated from the reaction mixture by

• passing the gaseous mixture through fused calcium chloride.

• dissolving the other two gases.

• filtering out the other two gases by passing through cotton wool.

• cooling the mixture.

What happens to the unreacted hydrogen and nitrogen?

• they are sold

• they are released into the atmosphere

• they are removed and used in other reactions

• they are recycled back to the start and reused in the Haber process

What is the catalyst for the Ostwald process?

• Platinum

• Iron

• Sodium

• Nitrogen