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Alcohol to the tune of 5% is allowed to be mix in petrol as per the Govt. of India decision.

1. Mixing of alcohol with gasoline produces gasohol. Advantages of fuel blends are that alcohol helps to increase the octane rating and reduce carbon monoxide (CO) and other tailpipe emissions from the engine.
2. Silicosis is caused by exposure to dust containing silica.
3. Lichens are sensitive to sulphur dioxide pollution, hence they serve as bioindicators of pollution.
4. Habitat destruction affects the survival of populations and reduces biodiversity.

Correct answer: Mixing of alcohol with gasoline produces gasohol. Advantages of fuel blends are that alcohol helps to increase the octane rating and reduce carbon monoxide (CO) and other tailpipe emissions from the engine.

Solution

Mixing alcohol with gasoline produces gasohol, which improves octane rating and reduces harmful emissions, aligning with the context of the question.

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