STATEMENT-1: Band gap in germanium is small.
because
STATEMENT-2: The energy spread of each germanium atomic energy level is infinitesimally small.
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ChemistryAssertion and reason+3 / -1Question 35 of 66
IIT-JEE 2007 · Paper 2, Chemistry question 35
Answer and worked solution
Official answer: B
Statement 1. Germanium is a semiconductor with a small band gap (about 0.7 eV). True.
Statement 2. In an isolated atom each energy level is sharp, with negligible spread; this is taken as true. It does not explain Statement 1: the gap in the solid is set by how the atomic levels broaden into bands when the atoms come together.
(B)