Question

Question Completion Status: QUESTION 5 Which of the following statements about combustion reactions is/are correct? 1. they are characterized by the reaction of a substance with oxygen ii. they form one or more oxygen-containing compounds, often including water iii. they emit heat a. only b. i, ii, 111 c. 11 and ili d. i and ili QUESTION 6

Answer 1

Combustion reaction involves reaction between combustible material and oxidiser to form oxidised products. It usually occur when any hydrocarbon react with oxygen to form carbon dioxide and water.

CH4 + O2  $\rightarrow$ CO2 + H2O

Combustion reaction is exothermic reaction i.e it produce heat and thus is commonly called burning.

So answer is b

All statements are correct.