Addition of ethylene dibromide to petrol

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