Chemical Engineering Plant Economics
Which of the following is the costliest source of getting hydrogen on commercial scale for the manufacture of nitrogeneous fertiliser?

Coke oven gas
Alectrolysis of water
Coal gasification
Steam reforming of naphtha

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Chemical Engineering Plant Economics
Depreciation

Is the unavoidable loss in the value of the plant, equipment and materials with lapse in time
Costs (on annual basis) are constant when the straight line method is used for its determination
Does figure in the calculation of income tax liability on cash flows from an investment
All of these

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