18 Questions
Which statement best describes the Smectic liquid crystal state?
Molecules arranged in layers with some order
What defines the Nematic liquid crystal state?
Threadlike structure
In which liquid crystal state do the molecules point along a common axis?
Cholesteric
What property makes liquid crystals unique compared to both liquids and solids?
Molecular mobility
Which type of liquid crystal demonstrates polymorphism?
Cholesteric
What distinguishes liquid crystals as an intermediate state?
Fluidity similar to liquids and long-range order like solids
How are cholesteric molecules aligned in a chiral nematic crystal?
At a slight angle to one another
What leads to the formation of a structure in cholesteric liquid crystals?
Slight angle alignment of molecules
How are nematic-like layers visualized in cholesteric crystals?
As helical layers
What process can result in the formation of thermotropic liquid crystals?
Heating of solids
Which component is involved in the formation of gall stones through the smectic mesophase?
Cholesterol
What characteristic of some liquid crystals allows them to detect areas of elevated temperature under the skin?
Consistent color changes with temperature
What type of liquid crystalline phase is frequently present in emulsions and contributes to enhanced physical stability?
Mesophases
Which type of liquid crystal phase is believed to have structures similar to those in cell membranes?
Mesophases
What characteristics make supercritical fluids different from gases and liquids?
They effuse through solids like a liquid
What property is absent in supercritical fluids due to the lack of a liquid/gas phase boundary?
High surface tension
Which type of liquid crystal displays a twisted structure, leading to unique optical properties?
Cholesteric liquid crystals
At what condition does a supercritical fluid not convert into a liquid under pressure change but dissolves materials like a liquid?
$T > T_{critical}$
Explore the physical state of matter that lies between solid crystals and liquids. Learn about the unique properties of liquid crystals that combine aspects of both solid crystals and liquids.
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