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UPSC 1998: Which one of the following metals does not form amalgams?
(a)Zinc
(b)Copper
(c)Magnesium
(d)Iron
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Not attemptedCorrect Answer: (d) Iron
An amalgam is an alloy of mercury with a metal. Zinc, copper and magnesium readily form amalgams with mercury, but iron does not because its surface rapidly passivates, giving it an extremely low affinity for mercury; therefore iron is the exception. ([licchavilyceum.com](https://licchavilyceum.com/upsc-civil-services-prelims-1998-solved-question-paper/))
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Frequently Asked Questions
What is the correct answer to this UPSC 1998 Science & Technology question?▼
The correct answer is option (d): Iron. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Chemistry question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1998, GS Paper 1, as Question 107. It falls under Science & Technology > Chemistry.
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 Chemistry?▼
UPSC has asked 53 questions from Chemistry (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.