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JEE Main 2007 — Physics Modern Physics
Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate?
Held on 30 Apr 2007 · Verified 6 Jul 2026.
The number of free conduction electrons is significant in C but small in Si and Ge.
The number of free conduction electrons is negligible small in all the three.
The number of free electrons for conduction is significant in all the three.
The number of free electrons for conduction is significant only in Si and Ge but small in C.
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