JEE Main Chemistry question
The soldiers of Napoleon's army while at the Alps during freezing winter suffered a serious problem as regards the tin buttons of their uniform. White metallic tin buttons got converted to grey powder. This transformation is related to [Jamia Millia Islamia 2007]
Answer: (A)
Solution
At very low temperatures, white (β, tetragonal) tin converts to grey (α, cubic diamond-type) tin, a change in allotropic/crystalline form known as "tin pest" or tin disease, causing the metal to
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