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Question
Solvent used in duo-sol extraction for lube oil upgradation is a mixture of
Options:
A .  propane & phenol-cresol mixture.
B .  methyl ethyl ketone & glycol.
C .  phenol & furfural.
D .  propane & liquid sulphur dioxide.
Answer: Option A
Answer: (a).propane & phenol-cresol mixture.
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