Which gas is evolved by incomplete combustion of wood or coal? a)Co2 b)N2 c)O2 d)CO Share with your friends Share 3 Koustuv Nayak answered this due to incomplete combustion of wood or coal carbon monoxide(CO) is released.so the answer will be d)CO 6 View Full Answer Sonam Kumari answered this c)o2 answer 0 Ayush Dam answered this answer d) CO carbon monoxide 1 Ankur answered this d) co is released 1 Sonam Kumari answered this sorry, d)co is right option. 2 Dhairy Shrivastava answered this Bro if u burn wood or charcoal it would definetly lead to release of gas like co2 but incomplete combustion leads to release of co which is harmful we all know that o2 is needed for combustion but when it does not happen co is released 2