AP EAMCET Engineering 23 Apr 2019 Shift 1 Paper

Section: Chemistry
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Question : 139 of 160
 
Marks: +1, -0
Which of the following statements are not correct?
(A) Diode is a combination of n-type and p-type semiconductors
(B) Silicon or germanium is election rich impurity
(C) Phosphorous and arsenic are electron deficient impurities
(D) Schottky defect decreases the density of the crystal
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