Addition of ethylene dibromide to petrol

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Q: 74 (CDS-I/2014)
Addition of ethylene dibromide to petrol

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,20,91,54,20,17,20

keywords: 

{'ethylene dibromide': [0, 0, 0, 1], 'sulphur compound': [0, 1, 0, 1], 'lead oxide': [0, 0, 0, 2], 'petrol': [2, 0, 1, 5], 'fuel': [1, 0, 5, 14], 'addition': [1, 0, 2, 4], 'octane number': [0, 0, 1, 1], 'substitute': [0, 0, 2, 1], 'elimination': [0, 0, 2, 2]}

Option 1: Adding ethylene dibromide to petrol does not directly increase the octane number of the fuel. The octane number is a measure of the fuel`s ability to resist knocking or pinging in a combustion engine. It is typically increased by adding substances such as tetra-ethyl lead (TEL) or other octane boosters.

Option 2: This is the correct answer. Adding ethylene dibromide to petrol can help with the elimination of lead oxide. Lead oxide is a byproduct of using TEL as an octane booster in petrol. Ethylene dibromide reacts with lead oxide to form a stable lead bromide compound, which can be easily eliminated from the fuel system, reducing the harmful effects of lead pollution.

Option 3: Ethylene dibromide does not have a significant role in removing sulfur compounds from petrol. Sulfur compounds are typically removed through other refining processes.

Option 4: Ethylene dibromide cannot serve as a direct substitute for tetra-ethyl lead in boosting the octane number of fuel. TEL is a highly effective octane booster, and while there are alternative compounds that can increase the octane number, ethylene dibromide is not one of them.

In conclusion, adding eth

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