. __________ is not an important refinery process for upgrading the quality of lubricating oil.(A) Deoiling (B) Solvent refining (C) Clay treatment (D) Hydro-treatment

. __________ is not an important refinery process for upgrading the
quality of lubricating oil.
(A) Deoiling
(B) Solvent refining
(C) Clay treatment
(D) Hydro-treatment
by

1 Answer

Answer :

(A) Deoiling
by

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