Question

# Silicon doped with electron-rich impurity forms ________.

A
ptype semiconductor
B
ntype semiconductor
C
intrinsic semiconductor
D
insulator

Solution

## The correct option is B $$n-type$$ semiconductorAn N-Type semiconductor is created by adding pentavalent impurities like phosphorus ($$P$$), arsenic ($$As$$), antimony ($$Sb$$), or bismuth ($$Bi$$). A pentavalent impurity is called a donor because it is ready to give a free electron to a semiconductor. A pentavalent impurity is electron rich impurity.So, the correct answer is option $$B$$.Chemistry

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