Question

Which of the following are not products of combustion?

A. Convection, conduction, radiation, and direct contact
B. Fire gases, heat, smoke, and light
C. Fire gases, water vapor, and carbon particles
D. Carbon monoxide, carbon dioxide, sulphur dioxide, and hydrogen cyanide

Answer 1

The products of combustion reactions usually include carbon dioxide, water vapor, and heat and light. Option D, which includes carbon monoxide, carbon dioxide, sulfur dioxide, and hydrogen cyanide, is not a correct answer because these are by-products of combustion.

Step-by-step explanation:

In combustion reactions, the products typically include carbon dioxide (CO2), water vapor (H2O), and energy in the form of heat and light. So, options A, B, and C are all products of combustion. This leaves us with option D, which consists of carbon monoxide (CO), carbon dioxide (CO2), sulfur dioxide (SO2), and hydrogen cyanide (HCN). Since carbon monoxide, carbon dioxide, sulfur dioxide, and hydrogen cyanide are all by-products of combustion, option D is not correct.