Fertiliser Technology
Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis?

Electrolysis of water
H? separation from coke oven gas
Cracking of natural gas
Steam reforming of naphtha

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Fertiliser Technology
Plant tranquillisers

Hold back stem growth and halt plants at a desired height
Cause early maturation of plants
Accelerate ripening of food and grain
Produce seedless fruit

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

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

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