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Q. Pick out the wrong statement.

  • (A) Wash oil is used for scrubbing benzol from coke oven gas
  • (B) A high swelling index number of coking coal indicates poor caking properties of coal
  • (C) Ammonia is recovered in the form of ammonium sulphate in direct process of by-product recovery
  • (D) Indian coals on an average contain 25-30% ash as against 10-12% ash in imported coking coal

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