Question

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Answer 1

Answer:

Wood has been a traditional fuel for both domestic and industrial use. However, it produces a lot of smoke that can cause respiratory problems. Also, wood is obtained from trees. Thus, using wood as a fuel causes deforestation. Therefore, slowly wood is replaced by LPG, which is a liquefied form of petroleum gas. It does not give out smoke and other pollutants and is a cleaner fuel. Again, fuel efficiency of LPG is more than that of wood. The calorific value of LPG is 55000 kj/kg, while that of wood is between 17000 to 22000 kj/kg. Hence, LPG is favoured over wood.

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Answer 2

Answer:

LPG

☆Gaseous fuel

☆Doesn't produce smokes

☆Calorific value is more (55000 kJ/kg)

☆Easily stored in cylinders

doesn't cause any pollution

WOOD

☆Solid fuel

☆Produces smoke

☆Calorific value is less (17000kJ/kg)

☆Requires more space to store

☆Causes more pollution

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