1. Substances burn in air and form carbon dioxide.
2. Burnt fuel should always leave some residue.
3. Water gas is a mixture of carbon monoxide a
nitrogen.
4. Calorific value of coke is more than that of coal.
5. Natural gas mainly contains methane and traces of
ethane and propane.
6. Wood burns with a flame.
7. There is a blue colour zone at the base of the wick
8. Presence of a combustible substance is not essential
for a substance to burn.
9. Red phosphorus can be stored in a bottle.
10. Coal gas is obtained from destructive distillation of
coal.
Answers
Answer:
Gaseous pollutants (e.g., CO, SO2, NOx, VOCs, O3 etc.)
Fossil fuel combustion produces gaseous pollutants, causing variation in atmospheric composition. Nitrogen Oxide (NO) reacts actively with ozone (O3) or radicals in atmosphere forming nitrogen dioxide (NO2). In lower atmospheric layers, sun light acts as catalyst in reactions between NO2 and VOC (Volatile Organic compounds) to produce Ozone. Carbon Monoxide (CO) produced from partial fossil fuel combustion. Nitrogen oxides and carbon monoxide produced from sulfur based fossil fuel (coal and heavy oils) combustion.
Transportation and power plants the major volatile organic compound emission sources, which affects respiratory system as well as instigates hematological problems and cancer.