As a specialist in the field of chemistry and physics, I can provide a detailed explanation regarding the electrical conductivity of molten sugar.

Electrical conductivity is a property that measures a material's ability to conduct electric current. This ability is primarily due to the presence of free-moving charges, typically electrons in metals or ions in electrolytes.

Sugar, scientifically known as sucrose, is a carbohydrate composed of carbon, hydrogen, and oxygen atoms linked together in a specific molecular structure. In its solid state, sucrose is an insulator, meaning it does not conduct electricity. This is because the electrons within the sucrose molecules are tightly bound to their respective atoms and do not move freely.

When sugar is heated and becomes molten, it transitions from a solid to a liquid state. However, this physical change does not alter the fundamental molecular structure of sucrose. The electrons within the sugar molecules remain localized and are not free to move throughout the substance. As a result, molten sugar, like its solid counterpart, is also a non-conductor of electricity.

It's important to distinguish between the properties of sucrose and ionic compounds, such as salts, which can conduct electricity when dissolved in water. This is because when salts dissolve, they dissociate into ions that are free to move and carry an electric charge. In contrast, sugar does not dissociate into ions when dissolved in water; it remains as molecules, and thus, a sugar solution is also non-conductive.

Furthermore, the statement that "When a teaspoon of sugar is dissolved in water the solution does not conduct electricity" is not entirely accurate. While it is true that a sugar solution is a poor conductor of electricity, it is not completely non-conductive. Water itself can conduct electricity to a very limited extent due to the presence of a small number of ions from the dissociation of water molecules (self-ionization). However, the addition of sugar does not significantly increase this conductivity, as sugar molecules do not contribute free ions to the solution.

In summary, whether in solid, molten, or dissolved form, sucrose does not conduct electricity because the electrons within its molecules are not free to move and there are no free ions present to carry an electric charge. The electrical conductivity of a material is a complex property influenced by its molecular structure, the presence of free charges, and the interactions between these charges and the material's atoms.

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Sugar is another molecular substance. Molten sugar does not conduct electricity. When a teaspoon of sugar is dissolved in water the solution does not conduct electricity. ... Whether solid, melted or in solution, these compounds cannot conduct electricity because the molecules are not charged.read more >>