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UPSC 2006: Which are the materials generally employed as solder in soldering operation in electronics?
(a)Iron and tin
(b)Lead and tin
(c)Aluminum and lead
(d)Aluminum and iron
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Not attemptedCorrect Answer: (b) Lead and tin
The common soft solder used in electronic circuitry is an alloy of tin and lead, typically 60 % Sn / 40 % Pb or the eutectic 63 % Sn / 37 % Pb. Iron, aluminium or their combinations are not used for electronic soldering. Hence the correct pair is Lead and Tin. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Solder?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2006 Science & Technology question?▼
The correct answer is option (b): Lead and tin. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Materials & Engineering question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2006, GS Paper 1, as Question 128. It falls under Science & Technology > Materials & Engineering.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Materials & Engineering?▼
UPSC has asked 23 questions from Materials & Engineering (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.