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Stalagmometer is cleaned to remove grease with the help of ____________

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Stalagmometer is cleaned to remove grease with the help of ____________

(a) Chromic acid

(b) Sulphuric acid

(c) Distilled water

(d) Tartaric acid

The question was posed to me during an online interview.

This interesting question is from Surface Tension in chapter Methods of Purification of Engineering Chemistry I

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Right answer is (a) Chromic acid

Best explanation: Stalagmometer is cleaned to remove grease with the help of chromic acid. It is used for the determination of surface tension.

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