Potassic fertilisers__________________?

A. Are useful during early stage of the plant growth
B. Stimulate early growth and accelerate seeding
C. Help in development of starches of potatoes and grain
D. None of these

Maximum stability of white phosphorous is at__________________?

A. Very high pressure
B. Atmospheric pressure
C. Room temperature
D. > 600°C

Promoter used in NH3 synthesis catalyst is__________________?

A. K2O
B. SiO3
C. V2O5
D. U2O3

P2O5 content in superphosphate is about _____________ percent?

A. 30-35
B. 15-20
C. 65-70
D. 85-90

Dehydration of ammonium carbamate produces__________________?

A. Urea
B. Biuret
C. Ammonia water
D. None of these

Calcium ammonium nitrate (CAN) is__________________?

A. A mixed fertiliser
B. A straight fertiliser
C. A complex fertiliser
D. Not a fertiliser; it is an explosive

NPK means a ______________ fertiliser?

A. Mixed
B. Potassic
C. Liquid
D. Solid

Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because______________________?

A. It is hygroscopic and explosive in nature
B. It is highly acidic in nature
C. It is a liquid at room temperature
D. Its nitrogen content is very less

Ammonium sulphate can be produced by reacting gypsum with____________________?

A. Ammonia
B. Ammonium carbonate
C. Nitric acid
D. None of these

Out of the following, N2 content is minimum in_____________________?

A. Urea
B. Ammonium nitrate
C. Ammonium sulphate
D. Ammonium chloride