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What is the length of the test tube in the determination of aniline number experiment?

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What is the length of the test tube in the determination of aniline number experiment?

(a) 120mm

(b) 130mm

(c) 140mm

(d) 150mm

I have been asked this question during an online interview.

My doubt stems from Oxidation Stability and Aniline Number topic in portion Lubricants of Applied Chemistry

1 Answer

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Correct option is (d) 150mm

Easiest explanation: The test tube is having the length of 150mm. It has a diameter of 25mm. The stirrer is attached for even miscibility of aniline and the lubricating oil.

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