Fertiliser Technology
Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by

Cryogenic operations (low temperature cooling)
Adsorption on palladium
None of these
Absorption (using ethanolamine or pyragalloll solution)

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

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