For an internal combustion engine to move a vehicle down the road,it must convert the energy stored in the fuel into mechanical energy to drive the wheels. In your car,the distributor and battery provide this starting energy by creating an electrical "spark",which helps in combustion of fuels like gasoline. Below is the reaction depicting complete combustion of gasoline in full supply of air:
`2C_8 H_(18)(l) +25 O_(2) (g) to 16 'x' `
‘A student while walking on the road observed that a cloud of black smoke belched out from the exhaust stack of moving trucks on the road.’ Choose the correct reason for the production of black smoke:

Options

A. Limited supply of air leads to incomplete combustion of fuels
B. Rich supply of air leads to complete combustion of fuel.
C. Rich supply of air leads to a combination reaction.
D. Limited supply of air leads to complete combustion of fuel.

Answer

A

Explanation

The limited supply of air leads to incomplete combustion of fuel, which in turn leads to the production of black smoke.