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

Answer:

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

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).

Answer 2

Answer:

2C2H6 + 7O2 → 4CO2 + 6H2O

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.