1 feb/ 24 feb fertilizers/7 class

Catalyst speed up a

• reaction

• chemical reaction

• physical change

• physical reaction

Catatlyst used in ammonia production is

• iron

• cold iron

• hot iron

• none of the above

With lack of Nitrogen,plants become

• long

• green

• beautiful with more flowers

• yellow and small in size

Ammonia is a

• useful chemical

• colourless gas

• good fertilizer

• all of the above

ammonia fertilizers are made by adding -----to ammonia gas

• water

• more ammonia

• hydrogen gas

• nitric acid

super phosphate fertilizers are made by adding

• nitric acid

• water

• ammonia

• sulphuric acid

Using too much fertilizers is very

• good

• best choice

• makes plants weak and they die

• expensive

Fertilizers can produce

• Air pollution

• land pollution

• water pollution

• all of the above

Fertilizers have ammonia and -----

• water

• sand

• no chemicals

• phosphorus

There are chemical and----- fertilizers

• physical

• natural

• dangerous

• all of the above