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The cloudiness of the lubricant is observed for every ___________

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The cloudiness of the lubricant is observed for every ___________

(a) 1^oC

(b) 2^oC

(c) 3^oC

(d) 4^oC

The question was posed to me during an interview.

My question is from Cloud Point and Pour Point topic in section Lubricants of Applied Chemistry

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Best answer
The correct option is (a) 1^oC

The explanation is: The cloudiness of the lubricant is observed for every 1^oC. First the oil is taken into the jar up to the marked level. The cork is fitted and then heated and observed for cloudiness for every 1^oC raise in temperature.

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