Why is it necessary to remove sulphur from petroleum products?
a. To reduce the emission of sulphur dioxide in exhaust fumes
b. To increase efficiency of automobiles engines
c. To use sulphur removed from petroleum for commercial purposes
d. To increase the life span of engine silencers
NCERT Class XII
Biology - Main Course Book
Chapter 16. Environmental Issues
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it is option a in your question
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To reduce the emission of sulphur dioxide in exhaust fumes
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