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Q.43.

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Organic Chemistry
Found in: Page 91

Short Answer

Question: Menthone and menthol are both isolated from mint. Explain why menthol is a solid at room temperature but menthone is a liquid.

Answer

The presence of hydrogen bonding makes menthol a solid and menthone a liquid at room temperature.

See the step by step solution

Step by Step Solution

Step 1: Intermolecular forces

There are diverse kinds of intermolecular forces, and hydrogen bond is one of them. The interaction existing in a particular molecule can be recognized with the help of a functional group.

Step 2: Factor that makes menthola solid and menthone a liquid at room temperature

In the case of menthol, hydrogen bonding is present asthe hydrogen is connected to an electronegative atom like oxygen. This kind of hydrogen bonding is absent in the case of menthone.

The presence of hydrogen bonding enables the menthol molecules to be tightly packed. The strength of hydrogen bonding in menthol is greater than the intermolecular forces in menthone.

Hence, menthol is a solid, and menthone is a liquid at room temperature.

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