Question

1.explain how the use of CNG in automobiles can reduce pollution
2. list conditions under which combustion can take place ​

Answer 1

Answer:

1.

• The combustion of fuel leaves unburnt carbon particles in the air, along with carbon monoxide(CO) - poisonous and harmful gas. Breathing CO causes headache,dizziness,etc. CNG burns completely leaving no harmful residue.
• Compressed Natural Gas(CNG) is a clean fuel and does not give smoke when burnt as compared to other petroleum containing fuels like petrol and diesel.
• For automobiles to run, petroleum fuel is burnt.
• The combustion of fuel leaves unburnt carbon particles in the air, along with carbon monoxide(CO) - poisonous and harmful gas.
• Breathing CO causes headache,dizziness,etc.
• CNG burns completely leaving no harmful residue.
• Hence, the use of CNG in automobiles has reduced pollution in our cities.

2. The conditions under which combustion takes place are as follows:

• Presence of combustible substance.
• Presence of supporter of combustion - oxygen.
• Attainment of ignition temperature.