Which one of the following does not form oxide on reaction with

June 1, 2025 by rawan239

Which one of the following does not form oxide on reaction with oxygen?

[amp_mcq option1=”Magnesium” option2=”Lead” option3=”Tin” option4=”Silver” correct=”option4″]

This question was previously asked in

UPSC CDS-2 – 2020

Download PDF Attempt Online

Silver (Ag) is a noble metal and is relatively unreactive. While many metals readily react with oxygen to form oxides, silver does not easily form an oxide when exposed to oxygen in the air under normal conditions.

Reactivity with oxygen varies among metals. Highly reactive metals like Magnesium react readily, forming stable oxides. Lead and Tin are less reactive than Magnesium but still form oxides. Silver is one of the least reactive metals and does not readily oxidize.

Silver tarnishes when exposed to sulfur compounds in the air, forming silver sulfide (Ag₂S), which appears as a black layer. Direct reaction with oxygen to form silver oxide (Ag₂O) requires specific conditions, such as heating at lower temperatures (around 160-200°C) and the oxide decomposes at higher temperatures.

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