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Combustion And Flame

Question

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Compare LPG and wood as fuels.

Solution

LPG	Wood
1. It has more calorific value i.e. 55000 kJ/ kg.	1. It has less calorific value i.e. 17000 to 22000.
2. It is smoke free fuel.	2. It gives out lot of smoke which is quite dangerous.
3. It is easy to transport.	3. It is difficult to transport wood.
4. It is easily stored in cylinders.	4. It is difficult to store as it needs of space to store.
5. It does not cause any environment problem.	5. It is cut so lead to deforestation thus gives rise to many natural and environmental problem.

Some More Questions From Combustion And Flame Chapter

List conditions under which combustion can take place.

Burning of wood and coal causes __________ of air.

A liquid fuel, used in homes is __________

Fuel must be heated to its __________ before it starts burning.

Fire produced by oil cannot be controlled by ___________ .

Explain how the use of CNG in automobiles has reduced pollution in our cities.

Compare LPG and wood as fuels.

Give reasons :

Water is not used to control the fire involving electrical equipment.

Give reasons :

LPG is a better domestic fuel than wood.

Give reasons :

Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.

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