If a small amount of antimony is added to germanium crystal (a) it becomes a p-type semiconductor (b) the antimony becomes an acceptor atom (c) there will be more free electrons than holes in the semiconductor (d) its resistance is increased

Answer: (c). Antimony is pentavalent, so it acts as a donor in Ge. Ge becomes n-type: free electrons outnumber holes, and resistance decreases. So the answer is (c).

If a small amount of antimony is added to germanium crystal | NEET 2011 (AIPMT, Prelims)

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Intrinsic & Extrinsic Semiconductors

If a small amount of antimony is added to germanium crystal

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Answer: (c)

Antimony is pentavalent, so it acts as a donor in Ge.
Ge becomes n-type: free electrons outnumber holes, and resistance decreases.
So the answer is (c).

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