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Carbon, silicon and germanium have four ...

Carbon, silicon and germanium have four valence electrons each. The most appropriate statement for these elements (at room temperature) is

A

Number of free electrons for conduction is significant in all three.

B

Number of free electrons for conduction is significant only in Si and Ge but small in C.

C

Number of free conduction electrons is significant in C but small in Si and Ge.

D

Number of free electrons is negligibly small in all three.

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The correct Answer is:
B
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