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

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

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Fertiliser Technology
Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the

Soil becomes too alkaline
Soil becomes too acidic
Osmotic pressure of the soil water becomes higher than that of the plant sap
Osmotic pressure of the soil water becomes less than that of the plant sap

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