Q: 8 (CDS-I/2017)

When a piece of pure silicon is doped with aluminium, then
question_subject: 
Science
question_exam: 
CDS-I
stats: 
0,8,26,7,11,13,3
keywords: 
{'conductivity': [0, 0, 0, 3], 'pure silicon': [0, 0, 0, 1], 'resistivity': [0, 0, 0, 2], 'silicon piece': [0, 0, 0, 1], 'aluminium': [1, 0, 3, 2], 'tvpc': [0, 0, 0, 1]}

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