Fertiliser Technology
Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition?

Electrolysis of water
Cryogenic removal of H₂ from coke oven gas
Steam reforming of naphtha
Natural gas cracking

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Fertiliser Technology
Nitrogenous fertiliser is required

None of these
To lessen the effect of excessive potash application
For accelerating fruit formation in later stage of growth
During the early stage of growth to promote development of stem and leaves

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