National 5 chemistry - Unit 3 - Fertilisers

What are the three essential elements that plants require?

• nitrogen phosphate potassium

• nitrogen sulphur potassium

• nitrogen potassium phosphorous

• nitrogen potassium polonium

what is the catalyst used in the Haber process?

• iron

• platinum

• silver

• gold

What is produced in the Ostwald process?

• ammonia

• nitrogen

• nitrate

• nitric acid

Which of the following is untrue for the haber process?

• ammonia gas is cooled and collected as a liquid

• a really high temperature is used to speed up the reaction

• hydrogen and nitrogen are the raw materials for the reaction

• too high a pressure is unsafe

Which of the following would be a suitable fertiliser?

• nitrogen dioxide

• potassium nitrate

• copper phosphate

• nitrogen oxide

What type of bonding is in ammonia?

• metallic

• covalent molecular

• covalent network

• ionic

Which of the following is an advantage of a natural fertiliser?

• Improves the structure of the soil
• Quicker than artifical fertiliser to effect plant growth
• mineral concentration is higher than artificial fertiliser

Which of the following is an disadvantage of a natural fertiliser?

• Makes the structure of the soil worse
• Is not biodegradable
• Is not environmentally friendly
• they are less effective in the winter than in summer.

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

The Haber process is the name we give to the industrial production of

• Ammonia
• Salt
• Sodium Hydroxide
• Soap