1ans is a]
27. Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate ?
(a) The number of free electrons for conduction is significant only in Si and Ge but small in C.
(b) The number of free conduction electrons is significant in C but small in Si and Ge.
(c) The number of free conduction electrons is negligibly small in all the three.
(d) The number of free electrons for conduction is significant in all the three.
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6 Answers
1The ans is 1st.
Reason: At room temperature, the no. of free electrons for conduction are more in semiconductors like Ge and Si. Carbon is a non metal with no significant electrons for conduction.