Presence of which fuel gas in exhaust fumes shows incomplete combustion of fuel?

Question

Presence of which fuel gas in exhaust fumes shows incomplete combustion of fuel? (A) Sulphur dioxide (B) Carbon monoxide and water vapour (C) Carbon monoxide (D) Nitrogen dioxide

Tardigrade Admin · Accepted Answer

Presence of CO in the exhaust shows incomplete combustion.

Q. Presence of which fuel gas in exhaust fumes shows incomplete combustion of fuel?

Sulphur dioxide

Carbon monoxide and water vapour

Carbon monoxide

Nitrogen dioxide

Presence of $CO$ in the exhaust shows incomplete combustion.