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The neutralisation number cannot give the __________ of the lubricating oil.

(a) Corrosive nature

(b) Amount of acid

(c) Amount of base

(d) Moisture level

I had been asked this question by my college director while I was bunking the class.

The origin of the question is Neutralization/Acidic Number topic in chapter Lubricants of Applied Chemistry

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Correct option is (a) Corrosive nature

For explanation I would say: The neutralisation number gives about the amount of acid present in lubricating oil, amount of base present in the lubricating oil, amount of moisture present in the lubricating oil. It cannot give about of the source of the oil and the corrosive nature of the oil.

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