Correct the following sentence$:$

The type of bonding in germanium is ionic.

Correct the following sentence$:$

The type of bonding in sodium chloride is covalent.

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Electrons are majority carriers in p-type semiconductor.

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Holes are majority carriers in n-type semiconductor.

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In an intrinsic semiconductor electrons are the only charge carriers.

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Addition of trivalent impurity to germanium crystal converts it to an n-type semiconductor.

Correct the following sentence. If the statement is correct, explain why?

The conductivity of a semiconductor increases with rise of temperature.