Question

C3H8 + 5O2 → 3CO2 + 4H2O C6H12O6 + 6O2 → 6CO2 + 6H2O AgNO3 + NaCl → AgCl + NaNO3 2Fe + O2 → 2FeO Which of the above reactions is an example of a combustion and also a synthesis reaction?

Answer 1

The combustion and synthesis reactions among the given examples are C3H8 + 5O2 → 3CO2 + 4H2O and C6H12O6 + 6O2 → 6CO2 + 6H2O, respectively.

Step-by-step explanation:

A combustion reaction is a reaction that involves a substance reacting with oxygen and producing heat and light. A synthesis reaction is a reaction where two or more substances combine to form a more complex substance. Among the given reactions, the combustion and synthesis reactions can be identified as:

1. C3H8 + 5O2 → 3CO2 + 4H2O: This is a combustion reaction because propane (C3H8) reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O) along with the release of heat and light.
2. C6H12O6 + 6O2 → 6CO2 + 6H2O: This is a synthesis reaction because glucose (C6H12O6) reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O).