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Reported Question / Answer
Q.) Solvent used in duo-sol extraction for lube oil upgradation is a mixture of
1)
methyl ethyl ketone & glycol.
2)
propane & phenol-cresol mixture.
3)
propane & liquid sulphur dioxide
4)
phenol & furfural.
5)
NULL
Answer :
2
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Message / Correct Answer / Suggestion
Human Verification : Answer 2 + 3 = ?
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