MCQOPTIONS
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				| 1. | 
                                    Pure carbon is completely burnt in oxygen. The flue gas analysis is 70%CO2, 20%CO and 10%O2. The percent excess oxygen used is | 
                            
| A. | 20 | 
| B. | 12.5 | 
| C. | 0 | 
| D. | 10 | 
| Answer» D. 10 | |