The pure crystalline substance on being heated gradually first forms a turbid liquid at constant temperature and still at higher temperature, turbidity completely disappears. The behaviour is a characteristic of substance forming :
A
allotropic crystals
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B
liquid crystals
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C
isomeric crystals
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D
isomorphous crystals
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Solution
The correct option is B liquid crystals Liquid crystals are matter in a state that has properties between those of conventional liquid and those of solid crystal. For instance, a liquid crystal may flow like a liquid but its molecules may be oriented in a crystal-like way.