Question
Asked Dec 31, 2019
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It often happens that a substance possessing a smectic liquid crystalline phase just above the melting point passes into a nematic liquid crystalline phase at a higher temperature. Account for this type of behavior.

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Expert Answer

Step 1

All matter can be classified as solid, liquid and gases mainly. In these physical states of matter, the solid state is composed of particles with least intermolecular distance and strongest intermolecular force of attraction. On the contrary, the gaseous state of matter is composed of particles with largest intermolecular distance and weakest intermolecular force of attraction. The liquid state of matter exhibits the intermediate properties of them.

Step 2

Liquid crystal is considered as the state of matter which exhibits the properties between those of conventional liquids and those of solid crystals such as a liquid crystal may flow like a liquid and also contains molecules oriented in a crystal-like way.

Step 3

Thermotropic liquid crystals are the phases which occur in a certain temperature range.&nb...

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