HomeEngineeringThe ‘laughing gas’ is 138. The ‘laughing gas’ isBy Admin / September 6, 2025 A. Nitrous oxide B. Nitric oxide C. Nitrogen trioxide D. Nitrogen pentoxide ✅ 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