InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
The figure showns how the emission of pollutants is related to the air`//`fuel ratio in an internal comustion engine using octance `C_(8)H_(18)` . Select the correct statement(s). A. Excess air leads to high `NO(g)` levelsB. Unburnt and partially burnt hydrocarbons lead to high `RH` and `CO` levelC. Stoichiometric ratio of air to fuel (on a mass basis) is about `14.5:1` if air contains `24% O_(2)`D. All of the above |
|
Answer» Correct Answer - D (a) As from figure , NO`(g)` content is high when air content is high-correct. (b) When gasoline is unburnt of partially burnt, it means air to fuel ratio is not stoichiometrically , hence content of `CO` and `C_(18)H_(18)` is high-correct. (c ) `underset(1mol e 114g)(C_(8)H_(18))+underset(12.5 mol es 400g O_(2))(12.5O_(2)) rarr 8CO_(2)+9H_(2)O` `(400)/(0.24)g air = 1667g` Ratio of air of fuel = `14.6:1` |
|