C12 Sulfur

• Chemistry
• Secondary Education

Fertilisers are mixtures of different compounds used to increase the growth of crops. Which pair of substances contains the 3 essential elements for plants growth?

1. ammonium nitrate and calcium phosphate
2. ammonium nitrate and potassium chloride
3. ammonium phosphate and potassium chloride
4. potassium nitrate and calcium carbonate

Which method can be used to obtain ammonia from ammonium sulfate?

1. Heat it with an acid
2. Heat it with an alkali
3. Heat it with an oxidising agent
4. Heat it with a reducing agent

1. X = hydrochloric acid Y = ammonia
2. X = hydrochloric acid Y = chlorine
3. X = sodium hydroxide Y = ammonia
4. X = sodium hydroxide Y = chlorine

Which element is not added in a firtiliser?

1. aluminium
2. nitrogen
3. phosphorus
4. potassium

Look up some uses of sulfur