Which of the following statements is incorrec | vedclass

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(D) $1$. Ortho-nitrophenol is steam volatile due to intramolecular hydrogen bonding,while para-nitrophenol is not due to intermolecular hydrogen bondi

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In the soap industry,glycerol is separated by fractional distillation.

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(D) $1$. Ortho-nitrophenol is steam volatile due to intramolecular hydrogen bonding,while para-nitrophenol is not due to intermolecular hydrogen bonding. Thus,they are separated by steam distillation. (Correct)$2$. Fractional distillation is used when the difference in boiling points is small (less than $20\,^{\circ}C$ to $30\,^{\circ}C$). The statement mentioning $10\,^{\circ}C$ is generally acceptable in this context. (Correct)$3$. Aniline is sensitive to high temperatures and decomposes before boiling at atmospheric pressure; therefore,it is purified by steam distillation. (Correct)$4$. Glycerol is separated from spent lye in the soap industry by distillation under reduced pressure,not by fractional distillation. (Incorrect)

Which of the following statements is incorrect?

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