Question

Two fuels A and B , A burns with a blue flame and B burns with a yellow sooty flame. Which fuel would you prefer to use and why?

Answer 1

Answer

Here we would prefer Fuel A

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• When a fuel produces blue flame that means the fule is completely used, that is complete combustion

• When a fuel produces yellow flame it means the fuel is not completely burnt or in other words, it is incomplete combustion

• Also another reason for Blue flame is that enough amount of oxygen is available

• In the case where it produces yellow flame there might me a lack of oxygen and so due to this the combustion can't be complete

• Oxygen is a primary requirement for combustion if there is enough fuel and heat but no oxygen then there will be no combustion

• Sun uses a different principal and doesn't need this oxygen there [There is no oxygen in space and that's why astronauts carry oxygen cylinders]

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