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 [AIEEE 2004]

An interaction with nitrogen of the air at very low to temperatures

A change in the partial pressure of oxygen in the air

A change in the crystalline structure of tin

An interaction with water vapour contained in the humid air

Soldiers of Napolean army while at Alps during freezing winter suffere

1.	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 [AIEEE 2004]
A.	A change in the partial pressure of oxygen in the air
B.	A change in the crystalline structure of tin
C.	An interaction with nitrogen of the air at very low to temperatures
D.	An interaction with water vapour contained in the humid air
Answer» C. An interaction with nitrogen of the air at very low to temperatures

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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 [AIEEE 2004]

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