Which are the materials generally employed as solder in soldering operations in electronics?

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Q: 28 (IAS/2006)
Which are the materials generally employed as solder in soldering operations in electronics?
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question_subject: 

Science

question_exam: 

IAS

stats: 

0,59,29,11,59,14,4

keywords: 

{'soldering operations': [0, 0, 1, 0], 'solder': [0, 0, 1, 0], 'materials': [0, 1, 1, 0], 'aluminium': [1, 0, 3, 2], 'electronics': [1, 0, 2, 3], 'lead': [7, 1, 11, 11], 'tin': [0, 0, 0, 1], 'iron': [0, 0, 1, 1]}