Question

Which equation represents a combustion reaction? Pb(NO3)2 + 2HCl → PbCl2 + 2HNO3 2SO2 + O2 → 2SO3 2C2H6 + 7O2 → 4CO2 + 6H2O Ca + 2HCl → CaCl2 + H2

Answer 1

2C2H6 + 7O2 → 4CO2 + 6H2O

Step-by-step explanation:

Combustion is when a hydrocarbon (a compound made of only hydrogen and carbon) reacts with oxygen at high temperature to produce CO2 and H2O gases.

Answer 2

`2C_2H_6+7O_2\rightarrow4CO_2+6H_2O` it is a combustion reaction.

Step-by-step explanation:

Combustion reaction is the type of reaction in which a hydrocarbon heated up in the presence of oxygen to form water and carbon dioxide.

`C_2H_6` is ethane and it is a hydrocarbon. The combustion reaction of ethane is as follows :

`2C_2H_6+7O_2\rightarrow4CO_2+6H_2O`

So, the correct option is (c).