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The stearate ion has a ________ carbons long hydrocarbon chain.

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The stearate ion has a ________ carbons long hydrocarbon chain.

(a) 17

(b) 19

(c) 21

(d) 23

I have been asked this question in an interview for job.

This intriguing question comes from Lubricants topic in section Industrially Important Materials of Engineering Chemistry II

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Best answer
Right answer is (a) 17

Easiest explanation: The stearate ion has a 17 carbons long hydrocarbon chain, which is hydrophobic in nature.

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