The ---------- of free electrons in covalent compounds make them ----------- conductors of electricity.

presence

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absence

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good

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poor

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Solution

The correct options are
B absence
D poor
The absence of free electrons in covalent compounds makes them Poor conductors of electricity.
Because covalent bonds are formed by sharing of electrons. In covalent compounds, No free electrons exist which is required for electricity transfer(i.e. flow of free electrons). Therefore they are poor conductors of electricity.

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