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Pick out the wrong statement. | |
A. | Indian coals on an average contain 25-30% ash as against 10-12% ash in imported coking coal. [Wrong Answer] |
B. | Ammonia is recovered in the form of ammonium sulphate in direct process of by-product recovery. [Wrong Answer] |
C. | A high swelling index number of coking coal indicates poor caking properties of coal. [Correct Answer] |
D. | Wash oil is used for scrubbing benzol from coke oven gas. [Wrong Answer] |