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Periodic determination of acid number is useful to indicate the progress of ________

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Periodic determination of acid number is useful to indicate the progress of ________

(a) Oxidation number

(b) Reduction number

(c) Acidic number

(d) Neutralisation number

I had been asked this question in an internship interview.

The doubt is from Neutralization/Acidic Number in portion Lubricants of Applied Chemistry

1 Answer

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Correct option is (a) Oxidation number

Easy explanation: The periodic determination of the acid number is useful to indicate the progress of oxidation number. The age of the oil is determined by the increase in acid number with time due to hydrolysis with moisture.

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