Amount of ethanol that can be added in petrol and used in conventional gasoline engines is

5-10%

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10-20%

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15-25%

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25-40%

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Solution

The correct option is A 5-10%
Amount of ethanol that can be added in petrol and used in conventional gasoline engines is about 5% to 10%. This is done because ethanol is a particulate-free burning fuel source. At many gas stations, E10 ethanol is widely used. It is a mixture of 10% ethanol with 90% gasoline.
Thus, the correct answer is '5-10%.'

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