MHT CET 202622 AprilMorning Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 22 April
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Solid State
MHT CET 2026 · 22 April · Morning Shift · Chemistry · Solid State
Which one of the following elements when doped with silicon makes...
Which one of the following elements when doped with silicon makes it p-type semiconductor ?
Options
- AAs
- BBi
- CGa
- DSb
Correct answer
C. Ga
Step-by-step solution
Silicon is a Group 14 element with four valence electrons.
To form a p-type semiconductor, silicon must be doped with a trivalent impurity (Group 13 element), which creates a hole (deficiency of an electron) in the crystal lattice.
Among the given options, As, Bi, and Sb are Group 15 elements (pentavalent impurities) and will form n-type semiconductors when doped with silicon.
Ga (Gallium) is a Group 13 element. Therefore, doping silicon with Ga makes it a p-type semiconductor.
Answer: Ga
To form a p-type semiconductor, silicon must be doped with a trivalent impurity (Group 13 element), which creates a hole (deficiency of an electron) in the crystal lattice.
Among the given options, As, Bi, and Sb are Group 15 elements (pentavalent impurities) and will form n-type semiconductors when doped with silicon.
Ga (Gallium) is a Group 13 element. Therefore, doping silicon with Ga makes it a p-type semiconductor.
Answer: Ga