5. Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa)
A : use coal for heating purpose.
B : gasify coal to get hydrogen from coal gas.
C : use coal as filler in fertiliser.
D : use coal as conditioner in fertiliser.
6. Catalyst used in ammonia synthesis uses __________ as a promoter.
7. Heating of orthophosphoric acid to about 900°C, produces
A : metaphosphoric acid
B : pyrophosphoric acid
C : no change in it
D : none of these
8. Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by
A : steam reforming of naphtha and cracking of natural gas.
B : electrolysis of water.
C : cryogenic separation of hydrogen from coke oven gas.
D : all (a), (b) and (c)