The Soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to
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a
A change in the partial pressure of oxygen in theair
b
A change in the crystalline structure of tin
c
An interaction with nitrogen of he air at very low temperature
d
An interaction with water vapour contained in the humid air
answer is B.
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Detailed Solution
Grey tin⇌ white in Grey tin is brittle and crumbles down to powder in very cold climate.