Statement I: Band gap in germanium is small.
Statement II: The energy spread of each germanium atomic energy level is infinitesimally small. (J2007, 3M)

Statement I is true; Statement II is true; Statement II is the correct explanation of Statement I.

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Statement I is true; Statement II is true; Statement II is not the correct explanation of Statement I.

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Statement I is true; Statement II is false.

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Statement I is false; Statement II is true.

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Solution

The correct option is B.

Germanium is a semiconductor in which the energy gap between the adjacent band is sufficiently small for thermal energy to be able to promote a small number of electrons from the full valence band energy level to the conduction band energy level.

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