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The soldier of Napolean army while at Al...

The soldier 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 :

A

a change in the crystalline structure of tin.

B

an interaction with nitrogen of the air at very low temperature.

C

a change in the partial pressure of oxygen in the air.

D

an interaction with water vapour contained in the humid air.

Text Solution

Verified by Experts

The correct Answer is:
A
White metallic tin i.e., `(beta-Sn)` changes to another allotrope, grey `(alpha-Sn)` at low temperature `(T lt 13.2^(@)C)`
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The soldiers of Napoleon army while at Alps during freezing winter suffered a serious problem with regard to the tin buttons of their uniform. White metallic tin buttons get converted to grey poweder. This transformation is relate to