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Biology
Environmental Issues
CBSE
Class 12
Biology
Class 12 - Biology
Environmental Issues
MCQ
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1.
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.
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