HomeEngineeringIf a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains__________________? 366. If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains__________________?By Admin / September 7, 2025 A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen ✅ The correct answer is option A.
1. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm². Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin
2. Transformer cores are normally made from Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin