Question

A student while walking on the road observed that a cloud of black smoke bleched out from the exhaust stack of moving trucks on the road. Choose the correct reason for the production of black smoke: * Limited supply of air leads to incomplete combustion of fuel. Rich supply of air leads to complete combustion of air Limited supply of air leads to Combination reaction Limited supply of air leads to complete Combustion.​

Answer 1

Answer:

i think so b

its a guess see other website too

Answer 2

The reason for the production of black smoke is - Limited supply of air which leads to incomplete combustion of fuel.

• Automobiles burn fossil fuels (hydrocarbons).
• The unburnt hydrocarbons (black) are released into the air and serve as pollutants.
• In a limited supply of oxygen, carbon burns to form Carbon Monoxide (CO) which is a greenhouse gas.
• Heavy metal catalysts like Rhodium and Platinum are fitted in automobiles which completely burn the hydrocarbons to release carbon dioxide and water which are not harmful.