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

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

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Chemical Engineering Plant Economics
Pick out the correct statement.

Difference between income and expense is termed as gross revenue
Unamortised cost is the difference between the original cost of a property and all the depreciation charges made to dat
Sum-of-the-years-digits methods of depreciation calculation accounts for the interest on the investment
Scrap value is the net amount of money obtainable from the sale of used property over and above any charges involved in its removal & sale

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