Pick out the wrong statement.

Indian coals on an average contain 25-30% ash as against 10-12% ash in imported coking coal

Ammonia is recovered in the form of ammonium sulphate in direct process of by-product recovery

A high swelling index number of coking coal indicates poor caking properties of coal

Answer

Wash oil is used for scrubbing benzol from coke oven gas

Answer: Option C

Answer: Option C

No explanation is given for this question Let's Discuss on Board