_______________ is a donor impurity for semi-conductors ?
Correct answer: B. Antimony
- A. Boron
- B. Antimony
- C. Gallium
- D. None of these
Explanation
Antimony is a Group V element with five valence electrons, so when added to a Group IV semiconductor such as silicon it supplies an extra electron and forms an n-type material. Boron and gallium are Group III acceptor impurities.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Chemical Process Principles
2,710 free Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Process Principles questions
Caustic soda is transported in _____________ lined containers ?
When iron is rusted, it is__________________?
Post weld heat treatment is done by____________________?
Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the ______________ stress?
How many molecules per unit cell are there in a face centred cubic lattice ?
'Semi steel' is__________________?