Question

If air fuel ratio of the mixture in petrol engine is more than 15:1                                                           

      (a) NO_x is reduced

      (b) CO₂ is reduced

      (c) HC is reduced

      (d) CO reduced

Answer 1

If air fuel ratio increases means the fraction of air portion is increase. In petrol engine most pollution contents are CO and HC.

Increases air fuel ratio the initially HC is decrease but then increases. Whereas CO is decrease.

My answer is option (d)- CO reduced