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Q.

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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An Intiative by Sri Chaitanya

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.
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