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?

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]}

The question asks about the materials commonly used as solder in electronics for soldering operations.

Option 1: Iron and Tin - This pair is not commonly used as soldering materials in electronics. Iron is typically used as a soldering tool, not the solder itself, due to its high melting point.

Option 2: Lead and Tin - This is the correct answer. These two metals are commonly used in solder for electronics. Lead and tin alloy is often used because it has a low melting point that is suitable for electronics soldering, and it provides good electrical connection.

Option 3: Aluminium and Lead - This pairing is not commonly used as solder materials. Aluminium, although a common metal in electronics, is not typically used in solder due to its high thermal conductivity and oxide layer. Lead, although often used, is not combined with Aluminium for the solder.

Option 4: Aluminium and Iron - These two metals are not typically used as solder due to their high melting points and other properties that are not conducive to electronics soldering.