Which of the following is not a mixed fertiliser ?

A. Natural gas as a source of hydrogen
B. Natural gas as heating medium
C. Coal gas as a source of hydrogen
D. Coal gas as heating medium

A. Coke oven
B. Producer
C. Natural
D. Coal

A. Carbonate
B. Phosphate
C. Bicarbonate
D. Silicate

A. 120°C and 300 atm
B. 190°C and 200 atm
C. 400°C and 550 atm
D. 200°C and 10 atm

A. Nickel
B. Platinum
C. Silica gel
D. Rhodium

A. Fuel
B. H2
C. N2
D. O2